CVE-2026-50627
Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator
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, which fixes this issue.
INFO
Published Date :
June 12, 2026, 10:16 a.m.
Last Modified :
June 15, 2026, 9:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | HIGH | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
Solution
- Upgrade Apache CXF to version 4.2.2 or later.
- Ensure JWT 'aud' claims are validated correctly.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-50627.
| URL | Resource |
|---|---|
| https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m | Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/06/11/4 | Mailing List Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-50627 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-50627
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-50627 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-50627 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 15, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H -
Initial Analysis by [email protected]
Jun. 15, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* versions up to (excluding) 4.1.7 *cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:* versions from (including) 4.2.0 up to (excluding) 4.2.2 Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/06/11/4 Types: Mailing List, Third Party Advisory Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m Types: Vendor Advisory -
New CVE Received by [email protected]
Jun. 12, 2026
Action Type Old Value New Value Added 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, which fixes this issue. Added CWE CWE-289 Added Reference https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jun. 12, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/06/11/4