CVE-2026-15386 Meow Gallery < 5.5.2 - Author+ Stored XSS via Attachment Alt-Text
Authors can inject JavaScript via attachment alt-text in Meow Gallery, executing code in visitors' browsers including administrators.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-15386?
CVE-2026-15386 is a medium-severity cross-site scripting vulnerability in Unknown Meow Gallery, published on 7 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
The Meow Gallery WordPress plugin before 5.5.2 does not escape an attachment's alt text before outputting it into an attribute of the link it builds for linked galleries, allowing users with the Author role or above to store a JavaScript payload that executes in the browser of any visitor (including administrators) who views a post containing such a gallery.
Weakness: CWE-79
Which versions are affected by CVE-2026-15386?
How do I fix CVE-2026-15386?
No fix has been published for CVE-2026-15386 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-2026-15386 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15386 exists.
Sources
Also known as GHSA-ff3q-prph-g9j7.