9.1

CVE-2026-65583: apache software foundation apache cxf

CVSS: 9.1v3.1CriticalModified
Published 06-08-2026Last modified 07-08-2026
Open JSON

Vulnerability summary

CVE-2026-65583 is a critical (CVSS 9.1) vulnerability in apache software foundation apache cxf. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 18.9% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.28%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-08-2026
    PublishedVulnerability first disclosed.
  2. 07-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

+0.02 pp

From 0.26% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.28%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache1 product
  • cxf< 3.6.12 | ≥ 4.0.0, < 4.1.8 | ≥ 4.2.0, < 4.2.3
Apache software foundation1 product
  • apache cxf≥ 4.2.0, < 4.2.3 | ≥ 4.0.0, < 4.1.8 | < 3.6.12

2 vendors · 2 products

References

2 links