CVE-2026-27973 Audiobookshelf has Stored XSS in ItemSearchCard.vue via Audiobook Metadata (Search Results on Mobile App)
Attackers with library modification privileges can execute arbitrary JavaScript in the Audiobookshelf mobile app via malicious metadata, leading to session hijacking and data exfiltration.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-27973?
CVE-2026-27973 is a medium-severity cross-site scripting vulnerability in advplyr audiobookshelf, published on 26 Feb 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Audiobookshelf is a self-hosted audiobook and podcast server. A stored cross-site scripting (XSS) vulnerability exists in versions prior to 0.12.0-beta of the Audiobookshelf mobile application that allows arbitrary JavaScript execution through malicious library metadata. Attackers with library modification privileges can execute code in victim users' browsers/WebViews, potentially leading to session hijacking, data exfiltration, and unauthorized access to native device APIs. The issue is fixed in audiobookshelf-app version 0.12.0-beta, corresponding to audiobookshelf version 2.12.0.
Weakness: CWE-79
Which versions are affected by CVE-2026-27973?
It affects 2 products.
Products include Audiobookshelf Audiobookshelf, Audiobookshelf Audiobookshelf Mobile App.
How do I fix CVE-2026-27973?
No fix has been published for CVE-2026-27973 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-27973 being exploited?
There is no known exploitation of CVE-2026-27973 in the wild and no public exploit code.
Other vulnerabilities in advplyr audiobookshelf
- CVE-2025-57800 Audiobookshelf vulnerable to OIDC token exfiltration and account takeover
- CVE-2025-25205 Remote Authentication-Bypass can lead to server crash or limited information disclosure due to faulty pattern matching
- CVE-2023-47619 Audiobookshelf Server-Side Request Forgery and Arbitrary File Read Vulnerability
- CVE-2023-47624 Audiobookshelf Arbitrary File Read Vulnerability
- CVE-2025-46338 Audiobookshelf Vulnerable to Cross-Site-Scripting Reflected via POST Request in /api/upload
Sources
Also known as GHSA-2433-p93m-xhhg.