Is CVE-2026-54430 actively exploited?

No active exploitation of CVE-2026-54430 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54430 be exploited remotely?

No. CVE-2026-54430 requires local access to exploit.

What is the CVSS score of CVE-2026-54430?

CVE-2026-54430 has a CVSS score of 5.1 (MEDIUM).

HOME VULNERABILITIESCVE-2026-54430

MEDIUM

CVE-2026-54430

CWE-918Published: July 2, 2026· Updated: Jul 2, 2026

5.1

CVSS v3.1

EPSS:0.12%probability of exploitation in 30 daysPercentile:2.2th

Official Description

liboauth2 is vulnerable to Server-Side Request Forgery in oauth2_jose_jwks_aws_alb_resolve() function. The AWS ALB verifier reads both signer and kid from the unverified JWT

header. If signer matches the configured ARN, kid is appended to

alb_base_url without URL encoding or path sanitization, and the HTTP GET

is issued before signature verification. This allows an attacker to force

the server to send a GET request to an attacker-chosen internal path.

This issue was fixed in version 2.3.0

NVD Source

Technical Analysis

CVE-2026-54430 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:N/VI:L/VA:N/SC:L/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