CVE-2026-66909

Apache CXF: Unsafe deserialization of inbound JMS ObjectMessage

At a glance

Severity: CRITICAL 9.8
EPSS: EPSS 1.15 % · percentile 67 (2026-10-28)
State: PUBLISHED
Published: 2026-08-06
Updated: 2026-08-07
Assigner: apache
NVD status: Modified

Description

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Weaknesses (CWE)

CWE-502

European references

ENISA EUVD · EUVD-2026-53854
GCVE · GCVE-0-2026-66909

CERT-FR advisories

CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* < 3.6.12
cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* ≥ 4.0.0 < 4.1.8
cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* ≥ 4.2.0 < 4.2.3

Affected products

Product	Versions
Apache Software Foundation · Apache CXF	affected 4.2.0 < 4.2.3 ; affected 4.0.0 < 4.1.8 ; affected 0 < 3.6.12

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD