DEBIAN-CVE-2026-54430

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Source

https://security-tracker.debian.org/tracker/CVE-2026-54430

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54430.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-54430

Upstream

CVE-2026-54430

Published

2026-07-02T11:16:16Z

Modified

2026-09-14T17:03:43Z

Severity

5.1 (Medium) CVSS_V4 - 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 CVSS Calculator

Summary

[none]

Details

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

References

https://security-tracker.debian.org/tracker/CVE-2026-54430

Affected packages

Debian:13 / liboauth2

Package

Name: liboauth2
Purl: pkg:deb/debian/liboauth2?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.1.0-2

2.1.1-1

2.2.0-1

2.2.0-2

2.2.1-1

2.3.0-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54430.json"

Debian:14 / liboauth2