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Home/Vulnerability/CVE-2026-50623

CVE-2026-50623

Apache CXF: Authentication Bypass in OAuth2 TokenIntrospectionService

Published: Jun 12, 2026Updated: Jun 12, 2026 Sources: CVE List NVD
NVD MITRE
6.5CVSS
MEDIUM

An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context check, the introspection endpoint (/services/oauth2/introspect) can be accessed by any unauthenticated network attacker. However note that this is a safeguard only in the case that someone forgot to enable authentication on the service. Users are recommended to upgrade to version 4.2.2 or 4.1.7, which fixes this issue.

EPSS Score
0.0%
Top 87.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None

Weaknesses

CWE-287

Affected Products

Apache CXF
Apache Software Foundation
Web & CMS Plugins / cms-core
apache software foundationoss-projectUSWeb & CMS Pluginsaka apache foundation

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://lists.apache.org/thread/ydzj8m5mqmjy13xgyj9mkk9hfff63qq7
lists.apache.org
http://www.openwall.com/lists/oss-security/2026/06/11/3
openwall.com

Timeline

Published
Jun 12, 2026
Last Updated
Jun 12, 2026

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