Vulnerability-Lookup

CVE-2026-66909 (GCVE-0-2026-66909)

Vulnerability from cvelistv5 – Published: 2026-08-06 10:23 – Updated: 2026-08-06 15:09

Title

Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage

Summary

Apache CXF's JMS transport deserializes the body of any inbound JMS ObjectMessage using native Java deserialization, with no type restrictions in place. Any attacker able to place a message on the service's JMS destination can submit a malicious serialized object, leading to denial of service or, if a suitable gadget class is on the classpath, remote code execution. The fix disables ObjectMessage deserialization by default, with a configuration switch to re-enable it if needed. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

apache

References

1 reference

URL	Tags
https://lists.apache.org/thread/lr5d4tg6tf7j29jmw…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache CXF	Affected: 4.2.0 , < 4.2.3 (semver) Affected: 4.0.0 , < 4.1.8 (semver) Affected: 0 , < 3.6.12 (semver)

Credits

Reported by n0mi1k

Show details on NVD website

JSON

To clipboard

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GHSA-GVW8-RCRX-9FXX

Vulnerability from github – Published: 2026-08-06 12:31 – Updated: 2026-08-06 12:31

Details

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-66909"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-06T11:16:30Z",
    "severity": null
  },
  "details": "Apache CXF\u0027s JMS transport deserializes the body of any inbound JMS ObjectMessage\u00a0using native Java deserialization, with no type restrictions in place. Any attacker able to place a message on the service\u0027s JMS destination can submit a malicious serialized object, leading to denial of service or, if a suitable gadget class is on the classpath, remote code execution. The fix disables ObjectMessage\u00a0deserialization by default, with a configuration switch to re-enable it if needed.\u00a0Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.",
  "id": "GHSA-gvw8-rcrx-9fxx",
  "modified": "2026-08-06T12:31:13Z",
  "published": "2026-08-06T12:31:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66909"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/lr5d4tg6tf7j29jmw8wt242oowonjqpx"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-66909 (GCVE-0-2026-66909)

GHSA-GVW8-RCRX-9FXX

Tags

Sightings

Nomenclature