CVE-2026-27974 Audiobooksheld VUlnerable to Stored XSS in WrappingMarquee.js via Audiobook Metadata (Mobile App Audio Player)
Attackers can execute arbitrary JavaScript in victim WebViews 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-2026-27974?
CVE-2026-27974 is a medium-severity cross-site scripting vulnerability in advplyr audiobookshelf-app, 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 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 (or control over a malicious podcast RSS feed) can execute code in victim users' WebViews, potentially leading to session hijacking, data exfiltration, and unauthorized access to native device APIs. audiobookshelf-app version 0.12.0-beta fixes the issue.
Weakness: CWE-79
Which versions are affected by CVE-2026-27974?
It affects 1 product.
Products include Audiobookshelf Audiobookshelf Mobile App.
How do I fix CVE-2026-27974?
No fix has been published for CVE-2026-27974 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-2026-27974 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27974 exists.
Sources
Also known as GHSA-8c9r-pvrj-vcf5.