Intel

CVE-2026-65583

cxf: Insufficient Verification of Data Authenticity (CVE-2026-65583)

criticalEPSS 0.3%

Affected

  • apache/cxf lt *..3.6.12
  • apache/cxf between 4.0.0..4.1.8
  • apache/cxf between 4.2.0..4.2.3

Description

Apache CXF’s OIDC relying-party token validation could accept self-issued ID tokens without enforcing required claim checks (issuer/subject/audience/time and sub_jwk binding), enabling authentication bypass with crafted tokens. However, note that self-issued ID tokens are not accepted by default in the validator. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fixes this issue.

Source: cvelistv5NVD (NIST)

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

apachecxf
4.0.0 – 4.1.84.2.0 – 4.2.33.6.12fixed from 3.6.12

Metrics

XIEM Effective CVSS
9.1
Source: cna-v3
EPSS percentile
18.7 %
Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status
—
Show all metrics
Severity
critical
Priority score
72.68
Exploit maturity
no public PoC known
CVSS v3
9.1
EPSS score
0.3 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-08-06 11:23 UTC
CWE
CWE-345

Weakness classes (CWE)

  • CWE-345Class

    Insufficient Verification of Data Authenticity

    The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Modified2026-08-07 00:16 UTC· af854a3a-2127-422b-91ae-364da2661108
    • Reference: http://www.openwall.com/lists/oss-security/2026/08/06/23
  2. Initial Analysis2026-08-06 18:41 UTC· nvd@nist.gov
    • CPE Configuration: OR *cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* versions up to (excluding) 3.6.12 *cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (excluding) 4.1.8 *cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* versions from (including) 4.2.0 up to (excluding) 4.2.3
    • Reference Type: Apache Software Foundation: https://lists.apache.org/thread/fzj8yzgfl53gclxrcdrnrx3grcpkq51j Types: Mailing List, Vendor Advisory
  3. CVE Modified2026-08-06 16:16 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • CVSS V3.1: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    • SSVC: {"id":"CVE-2026-65583","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technical…
  4. New CVE Received2026-08-06 12:16 UTC· security@apache.org
    • Affected: Apache CXF
    • Description: Apache CXF’s OIDC relying-party token validation could accept self-issued ID tokens without enforcing required claim checks (issuer/subject/audience/time and sub_jwk binding), enabling authentication bypass with crafted tokens. However, note that self-issued ID tokens are not accepted by default in the validator. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fixes this issue.
    • CWE: CWE-345
    • Reference: https://lists.apache.org/thread/fzj8yzgfl53gclxrcdrnrx3grcpkq51j

Linked advisories