CVE-2026-54430
Last modified
CVE-2026-54430 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. 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.
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
Metrics
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
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| OpenIDC | liboauth2 | < 2.3.0 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-54430?
How severe is CVE-2026-54430?
How do I fix CVE-2026-54430?
How Strix Helps
- One Click Account Takeover in GranolaHow a notification link broke out of Electron and led to a one-click account takeover.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-54422In OpenStack Ironic Python Agent through 11.5.0, a malicious…5.5
- CVE-2026-54423In OpenStack Ironic before 37.0.1, an Ironic user with the a…8.2
- CVE-2026-54424An Incorrect Use of Privileged APIs vulnerability in Unity P…8.4
- CVE-2026-54428Allocation of resources without limits or throttling in the …7.5
- CVE-2026-54429A vulnerability has been identified in SIMATIC S7-PLCSIM Adv…7.4
- CVE-2026-5443A heap buffer overflow vulnerability exists during the decod…9.8
- CVE-2026-54431In liboauth2 the Demonstrating Proof-of-Possession (DPoP) ve…5.1
- CVE-2026-54432Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2 allow…4.7
- CVE-2026-54433In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, t…10
- CVE-2026-5444A heap buffer overflow vulnerability exists in the PAM image…7.1
- CVE-2026-54443Dashy is a self-hostable personal dashboard. From 1.9.4 unti…5.9
- CVE-2026-54444Rejected reason: ]** REJECT ** DO NOT USE THIS CANDIDATE NUM…
Are you affected by CVE-2026-54430?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST