CVE-2026-71209
published 2026-08-05CVE-2026-71209: audiobookshelf's authentication-exemption check (server/routers/Auth.js) matches unauthenticated-allowed GET routes against req.path via a regex requiring a…
PriorityP259high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EXPLOIT
EPSS
2.00%
79.4th percentile
audiobookshelf's authentication-exemption check (server/routers/Auth.js) matches unauthenticated-allowed GET routes against req.path via a regex requiring a literal /items/:id/cover or /authors/:id/image shape, where req.path retains %2F sequences URL-encoded. CacheManager.handleCoverCache then joins this decoded value into a cache file path and streams the result before any database-backed ownership check.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| advplyr | audiobookshelf | 2.19.1 – 2.35.1 | — |
CVEs like this are exactly what “Exploited This Week” covers.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
No detection rules found.
Nuclei
Audiobookshelf - Authentication Bypass
nuclei·CVSS 7.5
CVE-2026-71209 [HIGH] Audiobookshelf - Authentication Bypass
Audiobookshelf - Authentication Bypass
Audiobookshelf contains a path traversal caused by improper authentication-exemption check on URL-encoded paths in server/routers/Auth.js, letting unauthenticated attackers read arbitrary files, exploit requires crafted URL with encoded traversal sequences.
Template:
id: CVE-2026-71209
info:
name: Audiobookshelf - Authentication Bypass
author: str4k3r
severity: critical
description: |
Audiobookshelf contains a path traversal caused by improper authentication-exemption check on URL-encoded paths in server/routers/Auth.js, letting unauthenticated attackers read arbitrary files, exploit requires crafted URL with encoded traversal sequences.
impact: |
Unauthenticated attackers can read arbitrary files accessible by the service account, leading to sens
No writeups or analysis indexed.
2026-08-05
Published