CVE-2026-57817

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the `c_hash` parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider (IdP) that omits the `c_hash`, the RP becomes vulnerable to Authorization Code Substitution/Injection attacks. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/pj63c3pf7kkp1xhr53do704fwj3t3htn	Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/06/19

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:cxf::::::::
	cpe:2.3:a:apache:cxf::::::::
	cpe:2.3:a:apache:cxf::::::::

History

No history.

Information

Published : 2026-08-06 11:16

Updated : 2026-08-07 05:17

NVD link : CVE-2026-57817

Mitre link : CVE-2026-57817

CVE.ORG link : CVE-2026-57817

JSON object : View

Products Affected

apache

cxf

CWE

CWE-20

Improper Input Validation

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