7.5

CVE-2026-100227: apache software foundation apache cxf Race Condition

CVSS: 7.5v3.1HighAnalyzed
Published 09-10-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-100227 is a high (CVSS 7.5) Race Condition vulnerability in apache software foundation apache cxf. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-10-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

Improper Verification of Cryptographic Signature vulnerability in Apache CXF's JAX-RS XML Security module. The JAX-RS XML Signature interceptors (XmlSigInHandler, XmlSigInInterceptor and the streaming XmlSecInInterceptor) did not ensure that the XML passed to the application was covered by the signature. An attacker with any document signed by a trusted key could wrap it in unsigned content, which the application would then treat as signed. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

10-10-202618-10-2026
EPSS score
0.33%

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< 3.6.13 | ≥ 4.0.0, < 4.1.9 | ≥ 4.2.0, < 4.2.4
Apache software foundation1 product
  • apache cxf≥ 4.2.0, < 4.2.4 | ≥ 4.0.0, < 4.1.9 | < 3.6.13

2 vendors · 2 products

References

2 links