Dashboard / CVE-2026-54431

CVE-2026-54431

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 45/100
Published: 2026-07-02 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: None
S: X
AT: None
VC: Low
VI: None
VA: None

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

Weakness Classification (1)

References & Advisories (3)

Bug Bounty Relevance

45 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

5.1 / 10.0 v4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.18%
Raw Score 0.001780
Percentile 7.4%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00178
2026-10-28
0.00178

Intelligence Sources

nvd ref →

External Links