CVE-2026-54431
Improper Data Validation in liboauth2
Description
In liboauth2 the Demonstrating Proof-of-Possession (DPoP) verifier accepts a proof whose JSON Web Key (jwk) header contains private key material. RFC 9449 section 4.3 step 7 requires the verifier to reject such a proof but oauth2_token_verify() function returns success for a malformed DPoP proof that embeds the private Elliptic Curve (EC) key in the header. This issue was fixed in version 2.3.0
No summary for this CVE yet.
Weaknesses
Affected Products
OpenIDC
oss-projectaka mod auth openidc, cjose, mod_auth_openidc
Exploitability
No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
References
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