November 13, 2026 Follow Egret
CVE-2026-21589 · CVE record: PUBLISHED

Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability

Atlassian Bamboo Data Center, Atlassian Bitbucket Data Center, Atlassian Confluence Data Center, Atlassian Crowd Data Center, Atlassian Crucible Data Center, Atlassian Fisheye Data Center, Atlassian Jira Service Management Data Center, Atlassian Jira Software Data Center

This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific files within the web application root directory in affected versions. Exploitation requires prior knowledge of the target file's exact name and path; this vulnerability does not allow attackers to enumerate or list directory contents. In some configurations, there may be some sensitive files that make this highly severe. This vulnerability allows an unauthenticated remote attacker to access specific files within the web application root directory in affected versions. The vulnerability must be addressed for affected versions of: -- Bitbucket Data Center, introduced in version >= 4.6.0, fix versions: 9.4.26, 10.2.8, 10.5.1 -- Confluence Data Center, introduced in version >= 5.10.0, fix versions 9.2.26, 10.2.19 -- Crowd Data Center, introduced in version >= 2.11.0, fix versions 6.3.7, 7.0.3, 7.1.7, 7.2.4 -- Jira Software Data Center, introduced in version >= 7.1.0, fix versions 9.12.40, 10.3.26, 11.3.12 -- Jira Service Management Data Center, introduced in version >= 3.1.0, fix versions 5.12.40, 10.3.26, 11.3.12 -- Bamboo Data Center >= 7.0.1, fix versions 10.2.24, 12.1.12 -- Crucible, fix versions 4.9.15 -- Fisheye, fix version 4.9.15 -- Exploitation requires prior knowledge of the target file's exact name and path. The vulnerability does not include the capability to enumerate or list directory contents.

Exploitation evidence

Known exploited · CISA KEV listed

Added 2026-10-15. Ransomware campaign use: Unknown.

CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CISA due date: 2026-10-18. This is the catalog’s deadline, not an assessment of your organization’s exposure.

KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗

Reported products and versions

Atlassian / Bamboo Data Center

Default status: Not specified

  • affected: All other versions
  • unaffected: Patch version 10.2.24 and later
  • unaffected: Patch version 12.1.12 and later

Atlassian / Bitbucket Data Center

Default status: Not specified

  • affected: All other versions
  • unaffected: Patch version 10.2.8 and later
  • unaffected: Patch version 10.5.1 and later
  • unaffected: Patch version 9.4.26 and later

Atlassian / Confluence Data Center

Default status: Not specified

  • affected: All other versions
  • unaffected: Patch version 10.2.19 and later
  • unaffected: Patch version 9.2.26 and later

Atlassian / Crowd Data Center

Default status: Not specified

  • affected: All other versions
  • unaffected: Patch version 7.2.4 and later
  • unaffected: Patch version 7.1.7 and later
  • unaffected: Patch version 7.0.3 and later
  • unaffected: Patch version 6.3.7 and later

Atlassian / Crucible Data Center

Default status: Not specified

  • affected: All other versions
  • unaffected: Patch version 4.9.15 and later

Atlassian / Fisheye Data Center

Default status: Not specified

  • affected: All other versions
  • unaffected: Patch version 4.9.15 and later

Atlassian / Jira Service Management Data Center

Default status: Not specified

  • affected: All other versions
  • unaffected: Patch version 11.3.12 and later
  • unaffected: Patch version 10.3.26 and later
  • unaffected: Patch version 5.12.40 and later

Atlassian / Jira Software Data Center

Default status: Not specified

  • affected: All other versions
  • unaffected: Patch version 11.3.12 and later
  • unaffected: Patch version 10.3.26 and later
  • unaffected: Patch version 9.12.40 and later

Fixes and workarounds

No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.

Sources and related reporting

CVE Program record ↗ · Download tracked evidence as JSON

Monitored source mentions

Shared CVE identifiers link source mentions; they do not establish that the reports describe the same incident.

Observed change timeline

History begins when Egret first downloads each source. It is not the complete upstream CVE history.

12 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-12",
  "epss": 0.99664,
  "percentile": 0.99949
}
10 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.99664,
  "percentile": 0.99949
}
09 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-09",
  "epss": 0.99664,
  "percentile": 0.99949
}
08 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-08",
  "epss": 0.99664,
  "percentile": 0.99949
}
07 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-07",
  "epss": 0.99664,
  "percentile": 0.99949
}
06 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-06",
  "epss": 0.99664,
  "percentile": 0.99949
}
06 Nov 2026, 06:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-05",
  "epss": 0.99664,
  "percentile": 0.99949
}
04 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-04",
  "epss": 0.99664,
  "percentile": 0.99949
}
03 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-03",
  "epss": 0.99477,
  "percentile": 0.99943
}
03 Nov 2026, 02:22 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-02",
  "epss": 0.99477,
  "percentile": 0.99943
}
03 Nov 2026, 02:22 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21589",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T03:56:41.309201Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2026-10-15",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21589"
              },
              "type": "kev"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-552",
                "description": "CWE-552 Files or Directories Accessible to External Parties",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-29T12:04:46.110Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/watchtowrlabs/watchTowr-vs-Atlassian-CVE-2026-21589"
          },
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21589"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Bamboo Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "status": "affected",
              "version": "All other versions"
            },
            {
              "status": "unaffected",
              "version": "Patch version 10.2.24 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 12.1.12 and later"
            }
          ]
        },
        {
          "product": "Bitbucket Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "status": "affected",
              "version": "All other versions"
            },
            {
              "status": "unaffected",
              "version": "Patch version 10.2.8 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 10.5.1 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 9.4.26 and later"
            }
          ]
        },
        {
          "product": "Confluence Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "status": "affected",
              "version": "All other versions"
            },
            {
              "status": "unaffected",
              "version": "Patch version 10.2.19 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 9.2.26 and later"
            }
          ]
        },
        {
          "product": "Crowd Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "status": "affected",
              "version": "All other versions"
            },
            {
              "status": "unaffected",
              "version": "Patch version 7.2.4 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 7.1.7 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 7.0.3 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 6.3.7 and later"
            }
          ]
        },
        {
          "product": "Crucible Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "status": "affected",
              "version": "All other versions"
            },
            {
              "status": "unaffected",
              "version": "Patch version 4.9.15 and later"
            }
          ]
        },
        {
          "product": "Fisheye Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "status": "affected",
              "version": "All other versions"
            },
            {
              "status": "unaffected",
              "version": "Patch version 4.9.15 and later"
            }
          ]
        },
        {
          "product": "Jira Service Management Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "status": "affected",
              "version": "All other versions"
            },
            {
              "status": "unaffected",
              "version": "Patch version 11.3.12 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 10.3.26 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 5.12.40 and later"
            }
          ]
        },
        {
          "product": "Jira Software Data Center",
          "vendor": "Atlassian",
          "versions": [
            {
              "status": "affected",
              "version": "All other versions"
            },
            {
              "status": "unaffected",
              "version": "Patch version 11.3.12 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 10.3.26 and later"
            },
            {
              "status": "unaffected",
              "version": "Patch version 9.12.40 and later"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific files within the web application root directory in affected versions. Exploitation requires prior knowledge of the target file's exact name and path; this vulnerability does not allow attackers to enumerate or list directory contents. In some configurations, there may be some sensitive files that make this highly severe. This vulnerability allows an unauthenticated remote attacker to access specific files within the web application root directory in affected versions. The vulnerability must be addressed for affected versions of: -- Bitbucket Data Center, introduced in version >= 4.6.0, fix versions: 9.4.26, 10.2.8, 10.5.1 -- Confluence Data Center, introduced in version >= 5.10.0, fix versions 9.2.26, 10.2.19 -- Crowd Data Center, introduced in version >= 2.11.0, fix versions 6.3.7, 7.0.3, 7.1.7, 7.2.4 -- Jira Software Data Center, introduced in version >= 7.1.0, fix versions 9.12.40, 10.3.26, 11.3.12 -- Jira Service Management Data Center, introduced in version >= 3.1.0, fix versions 5.12.40, 10.3.26, 11.3.12 -- Bamboo Data Center >= 7.0.1, fix versions 10.2.24, 12.1.12 -- Crucible, fix versions 4.9.15 -- Fisheye, fix version 4.9.15 -- Exploitation requires prior knowledge of the target file's exact name and path. The vulnerability does not include the capability to enumerate or list directory contents."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H",
            "version": "4.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Path Traversal (Arbitrary Read/Write)",
              "lang": "en",
              "type": "Path Traversal (Arbitrary Read/Write)"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T18:26:40.891Z",
        "orgId": "f08a6ab8-ed46-4c22-8884-d911ccfe3c66",
        "shortName": "atlassian"
      },
      "references": [
        {
          "url": "https://jira.atlassian.com/browse/BAM-26567"
        },
        {
          "url": "https://jira.atlassian.com/browse/BSERV-20604"
        },
        {
          "url": "https://jira.atlassian.com/browse/CONFSERVER-104488"
        },
        {
          "url": "https://jira.atlassian.com/browse/CRUC-8741"
        },
        {
          "url": "https://jira.atlassian.com/browse/CWD-6610"
        },
        {
          "url": "https://jira.atlassian.com/browse/FE-7583"
        },
        {
          "url": "https://jira.atlassian.com/browse/JRASERVER-79546"
        },
        {
          "url": "https://jira.atlassian.com/browse/JSDSERVER-16809"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f08a6ab8-ed46-4c22-8884-d911ccfe3c66",
    "assignerShortName": "atlassian",
    "cveId": "CVE-2026-21589",
    "datePublished": "2026-10-05T21:30:00.390Z",
    "dateReserved": "2026-01-01T00:00:40.722Z",
    "dateUpdated": "2026-10-29T12:04:46.110Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed

Stored KEV snapshot at this observation.

{
  "cveID": "CVE-2026-21589",
  "cwes": [
    "CWE-552"
  ],
  "dateAdded": "2026-10-15",
  "dueDate": "2026-10-18",
  "forensicTriage": "Yes",
  "knownRansomwareCampaignUse": "Unknown",
  "notes": "https://confluence.atlassian.com/security/cve-2026-21589-arbitrary-file-access-vulnerability-impacts-multiple-products-1870495748.html?ref=labs.watchtowr.com ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-21589",
  "product": "Multiple Products",
  "requiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
  "shortDescription": "Multiple Atlassian products (Bitbucket Data Center ,Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crowd Data Center, Crucible and Fisheye) contain a files or directories accessible to external parties vulnerability which could allow an unauthenticated attacker to access specific files within the web application root directory in affected versions.",
  "vendorProject": "Atlassian",
  "vulnerabilityName": "Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability"
}
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