CVE-2026-54431
In liboauth2 the Demonstrating Proof-of-Possession (DPoP) verifier accepts a proof whose JSON Web Key (jwk) header contains private key mate
CVSS
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No CVSS
EPSS
0.1%
p3
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Exploit Today
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0-100
Published: Jul 2, 2026 · Last modified: Jul 2, 2026 · CWE-358
0.1%EPSS · 30 days0.1%
2026-07-032026-07-16
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
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-445138.8 HIG54.6%
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