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CVE-2023-46604 · CVE record: PUBLISHED

Apache ActiveMQ, Apache ActiveMQ Legacy OpenWire Module: Unbounded deserialization causes ActiveMQ to be vulnerable to a remote code execution (RCE) attack

Apache Software Foundation Apache ActiveMQ, Apache Software Foundation Apache ActiveMQ Legacy OpenWire Module

The Java OpenWire protocol marshaller is vulnerable to Remote Code Execution. This vulnerability may allow a remote attacker with network access to either a Java-based OpenWire broker or client to run arbitrary shell commands by manipulating serialized class types in the OpenWire protocol to cause either the client or the broker (respectively) to instantiate any class on the classpath. Users are recommended to upgrade both brokers and clients to version 5.15.16, 5.16.7, 5.17.6, or 5.18.3 which fixes this issue.

Exploitation evidence

Known exploited · CISA KEV listed

Added 2023-11-02. Ransomware campaign use: Known.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA due date: 2023-11-23. 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

Apache Software Foundation / Apache ActiveMQ

Default status: unaffected

affected: 5.18.0 to < 5.18.3 (semver)
affected: 5.17.0 to < 5.17.6 (semver)
affected: 5.16.0 to < 5.16.7 (semver)
affected: 0 to < 5.15.16 (semver)

Apache Software Foundation / Apache ActiveMQ Legacy OpenWire Module

Default status: unaffected

affected: 5.18.0 to < 5.18.3 (semver)
affected: 5.17.0 to < 5.17.6 (semver)
affected: 5.16.0 to < 5.16.7 (semver)
affected: 5.8.0 to < 5.15.16 (semver)

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

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": 0.99992,
  "percentile": 0.99986
}

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

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.99992,
  "percentile": 0.99986
}

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

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-09",
  "epss": 0.99992,
  "percentile": 0.99986
}

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

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-08",
  "epss": 0.99992,
  "percentile": 0.99986
}

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

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-07",
  "epss": 0.99992,
  "percentile": 0.99986
}

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

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-06",
  "epss": 0.99992,
  "percentile": 0.99986
}

06 Nov 2026, 06:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-05",
  "epss": 0.99992,
  "percentile": 0.99986
}

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

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-04",
  "epss": 0.99992,
  "percentile": 0.99986
}

04 Nov 2026, 18:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

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

Stored EPSS snapshot at this observation.

{
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  "epss": 0.99992,
  "percentile": 0.99986
}

03 Nov 2026, 02:22 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-02",
  "epss": 0.99992,
  "percentile": 0.99986
}

03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed

Stored KEV snapshot at this observation.

{
  "cveID": "CVE-2023-46604",
  "cwes": [
    "CWE-502"
  ],
  "dateAdded": "2023-11-02",
  "dueDate": "2023-11-23",
  "forensicTriage": "No",
  "knownRansomwareCampaignUse": "Known",
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  "product": "ActiveMQ",
  "requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
  "shortDescription": "Apache ActiveMQ contains a deserialization of untrusted data vulnerability that may allow a remote attacker with network access to a broker to run shell commands by manipulating serialized class types in the OpenWire protocol to cause the broker to instantiate any class on the classpath.",
  "vendorProject": "Apache",
  "vulnerabilityName": "Apache ActiveMQ Deserialization of Untrusted Data Vulnerability"
}

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