9.1

CVE-2026-50627: apache software foundation apache cxf Authentication Bypass by Alternate Name

CVSS: 9.1v3.1CriticalModified
AliasesGHSA-9mrv-8pvf-hf4m
Published 12-06-2026Last modified 10-08-2026
Open JSON

Vulnerability summary

CVE-2026-50627 is a critical (CVSS 9.1) Authentication Bypass by Alternate Name vulnerability in apache software foundation apache cxf. EPSS estimates a 0.78% chance of exploitation in the next 30 days, higher than 54.9% 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
0.78%
0%100%
Low · +0.33 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-06-2026
    PublishedVulnerability first disclosed.
  2. 10-08-2026
    Last modifiedVulnerability information updated.

Description

The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' (Audience) claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.78%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

+0.33 pp

From 0.45% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.78%

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< 4.1.7 | ≥ 4.2.0, < 4.2.2
Apache software foundation1 product
  • apache cxf≥ 4.2.0, < 4.2.2 | ≥ 4.0.0, < 4.1.7 | < 3.6.12
Org.apache.cxf1 product
  • cxf-rt-rs-security-oauth2≥ 4.2.0, < 4.2.2 | < 4.1.7

3 vendors · 3 products

References

8 links