Is CVE-2026-54431 actively exploited?

No active exploitation of CVE-2026-54431 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54431 be exploited remotely?

No. CVE-2026-54431 requires local access to exploit.

What is the CVSS score of CVE-2026-54431?

CVE-2026-54431 has a CVSS score of 5.1 (MEDIUM).

HOME VULNERABILITIESCVE-2026-54431

MEDIUM

CVE-2026-54431

CWE-358Published: July 2, 2026· Updated: Jul 2, 2026

5.1

CVSS v3.1

EPSS:0.13%probability of exploitation in 30 daysPercentile:2.8th

Official 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

NVD Source

Technical Analysis

CVE-2026-54431 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

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