CVE-2026-50623: Apache CXF · Improper Authentication
Affects Apache CXFSource CVE Database V5
Not known to be exploited · CVSS 4.8 Medium · fixed in 4.2.2 : update Apache CXF when convenient.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 30% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 4.2.2, 4.1.7, 3.6.12
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 12 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade Apache to 4.2.2, 4.1.7 or 3.6.12.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apache Software FoundationApache CXF | Affected
| Fixed in
|
| Apache Software FoundationApache CXF | Affected
| Fixed in
|
| Apache Software FoundationApache CXF | Affected
| Fixed in
|
MavenApache Software Foundation/org.apache.cxf:cxf-rt-rs-security-oauth2pkg:maven/Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-oauth2Other threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users should upgrade Apache CXF to versions 4.2.2, 4.1.7, or 3.6.12 where the missing 'throw' keyword issue is fixed. Ensuring that authentication is properly enabled on the OAuth2 TokenIntrospectionService also mitigates the risk. Patch status is confirmed by the vendor advisory recommending these versions.
Description
CVE-2026-50623 is an authentication bypass vulnerability in Apache CXF's OAuth2 TokenIntrospectionService. The flaw is due to a missing 'throw' keyword in the security context check, allowing unauthenticated access to the introspection endpoint if authentication is not enabled. The issue is fixed in Apache CXF versions 4.2.2, 4.1.7, and 3.6.12. The vulnerability has a medium severity with a CVSS score of 4.8.