CVE-2026-74922 Document Gallery 4.1 - 5.1.1 - Unauthenticated Document Thumbnail Replacement via Thumber Webhook Signature Bypass
Unauthenticated attackers can replace document thumbnails by bypassing webhook signature verification in the Document Gallery WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-74922?
CVE-2026-74922 is a medium-severity vulnerability in Unknown Document Gallery, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Document Gallery WordPress plugin through 5.1.1 does not verify the signature on one of its unauthenticated webhook endpoints when no shared secret has been configured, which is the default state, allowing unauthenticated users to replace the thumbnail image the site publishes for any document.
Weakness: CWE-345
Which versions are affected by CVE-2026-74922?
How do I fix CVE-2026-74922?
No fix has been published for CVE-2026-74922 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-74922 being exploited?
There is no known exploitation of CVE-2026-74922 in the wild and no public exploit code.
Sources
Also known as GHSA-wpx6-cwp7-w9hm.