CVE-2026-71209: audiobookshelf - %2F Encoding Discrepancy Bypasses Cover/Image Auth Exemption Regex, Enabling Unauthenticated Path Traversal
advplyr · audiobookshelf
Affected: advplyr audiobookshelf · Exploitation: check available, not yet exploited
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 83% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- advplyr · audiobookshelffrom 2.19.1 up to and including 2.35.1
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
- CISA KEV
- Not listed
- Public check
- Audiobookshelf - Authentication Bypass · nuclei template in projectdiscovery/nuclei-templates
- Vendor
- advplyr
- Published
- August 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-71209 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.