November 13, 2026 Follow Egret
CVE-2026-5430 · CVE record: PUBLISHED

Authentication Bypass via JWT Algorithm Mismatch in Multiple WSO2 Products Allows Account Takeover

WSO2 WSO2 Universal Gateway, WSO2 WSO2 Traffic Manager, WSO2 WSO2 API Control Plane, WSO2 WSO2 API Manager, WSO2 WSO2 Carbon API Manager Rest API Utility

The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or supported. This allows an attacker to craft a JWT with an unsupported algorithm, which is then incorrectly validated, leading to unauthorized access. Successful exploitation of this vulnerability may result in unauthorized access to the system, including the potential compromise of administrative accounts and full account takeover. The CVSS score is adjusted to 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) in single-tenant deployments, reflecting that the impact is contained within a single security authority boundary.

Exploitation evidence

Known exploited · CISA KEV listed

Added 2026-09-24. 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: 2026-09-27. 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

WSO2 / WSO2 Universal Gateway

Default status: unaffected

  • affected: 4.5.0 to < 4.5.0.57 (custom)
  • affected: 4.6.0 to < 4.6.0.21 (custom)

WSO2 / WSO2 Traffic Manager

Default status: unaffected

  • affected: 4.5.0 to < 4.5.0.56 (custom)
  • affected: 4.6.0 to < 4.6.0.21 (custom)

WSO2 / WSO2 API Control Plane

Default status: unaffected

  • affected: 4.5.0 to < 4.5.0.58 (custom)
  • affected: 4.6.0 to < 4.6.0.22 (custom)

WSO2 / WSO2 API Manager

Default status: unaffected

  • unknown: 0 to < 4.1.0 (custom)
  • affected: 4.1.0 to < 4.1.0.257 (custom)
  • affected: 4.2.0 to < 4.2.0.197 (custom)
  • affected: 4.3.0 to < 4.3.0.108 (custom)
  • affected: 4.4.0 to < 4.4.0.72 (custom)
  • affected: 4.5.0 to < 4.5.0.57 (custom)
  • affected: 4.6.0 to < 4.6.0.21 (custom)

WSO2 / WSO2 Carbon API Manager Rest API Utility

Default status: unknown

  • affected: 9.20.74 to < 9.20.74.401 (custom)
  • affected: 9.28.116 to < 9.28.116.417 (custom)
  • affected: 9.29.120 to < 9.29.120.236 (custom)
  • affected: 9.30.67 to < 9.30.67.167 (custom)
  • affected: 9.31.86 to < 9.31.86.158 (custom)
  • affected: 9.32.147 to < 9.32.147.59 (custom)
  • unaffected: 9.33.106 to ≤ * (custom)

Fixes and workarounds

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/#solution https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/#solution

Sources and related reporting

CVE Program record ↗ · Download tracked evidence as JSON

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": 0.2239,
  "percentile": 0.97727
}
10 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.2239,
  "percentile": 0.97714
}
09 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-09",
  "epss": 0.2239,
  "percentile": 0.97711
}
08 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-08",
  "epss": 0.2239,
  "percentile": 0.97711
}
07 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-07",
  "epss": 0.2239,
  "percentile": 0.9771
}
06 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-06",
  "epss": 0.2239,
  "percentile": 0.97706
}
06 Nov 2026, 06:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-05",
  "epss": 0.2239,
  "percentile": 0.97704
}
04 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-04",
  "epss": 0.2239,
  "percentile": 0.97703
}
03 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-03",
  "epss": 0.2239,
  "percentile": 0.97699
}
03 Nov 2026, 06:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

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        },
        {
          "defaultStatus": "unknown",
          "packageName": "org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.rest.api.util",
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              "lessThan": "9.20.74.401",
              "status": "affected",
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              "lessThan": "9.28.116.417",
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03 Nov 2026, 02:22 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
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  "epss": 0.2239,
  "percentile": 0.97695
}
03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed

Stored KEV snapshot at this observation.

{
  "cveID": "CVE-2026-5430",
  "cwes": [
    "CWE-347"
  ],
  "dateAdded": "2026-09-24",
  "dueDate": "2026-09-27",
  "forensicTriage": "Yes",
  "knownRansomwareCampaignUse": "Unknown",
  "notes": "https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5328/ ; ; 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-2026-5430",
  "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": "WSO2 API Control Plane, API Manager, Traffic Manager & Universal Gateway contain a path traversal vulnerability that could allow for unrestricted file upload and lead to remote code execution. ",
  "vendorProject": "WSO2",
  "vulnerabilityName": "WSO2 Multiple Products Path Traversal Vulnerability "
}
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