CVE-2026-51583 Server-side request forgery in n/a
An authenticated attacker can exploit a webhook validation flaw in usememos to perform Server-Side Request Forgery against internal network resources.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-51583?
CVE-2026-51583 is a high-severity server-side request forgery vulnerability in n/a, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue in usememos through v0.30.0 allows a remote authenticated attacker to perform Server-Side Request Forgery (SSRF) via the Webhook validation mechanism in internal/webhook/validate.go, by setting a webhook target to an internal address.
Weakness: CWE-918
Which versions are affected by CVE-2026-51583?
How do I fix CVE-2026-51583?
No fix has been published for CVE-2026-51583 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-51583 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51583 exists.
Sources
Also known as GHSA-qmhr-x227-7hgf.