CVE-2026-104440 YesWiki before 4.6.7 Blind SSRF via bazarlist API idtypeannonce Parameter
Unauthenticated attackers can perform blind server-side request forgery via the bazarlist API to probe internal networks and access internal services.
- 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-2026-104440?
CVE-2026-104440 is a medium-severity server-side request forgery vulnerability in yeswiki, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
YesWiki before 4.6.7 contains a blind server-side request forgery vulnerability that allows unauthenticated attackers to make arbitrary server-side requests via the idtypeannonce parameter of /api/entries/bazarlist. Because isValidURL() always returns true, attackers can supply internal URLs fetched by curl in loadURLContent() to probe internal networks and reach internal services or metadata endpoints.
Weakness: CWE-918
Which versions are affected by CVE-2026-104440?
How do I fix CVE-2026-104440?
No fix has been published for CVE-2026-104440 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-2026-104440 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104440 exists.
Sources
Also known as GHSA-992m-5rj6-qxj2, GHSA-gw65-cpc7-hww6.