CVE-2026-110652 ONLYOFFICE DocumentServer before 10.0.0 SSRF via downloadfile isInJwtToken Bypass
Remote attackers can bypass IP filtering to access internal network resources and cloud metadata via the downloadfile endpoint when JWT verification is disabled.
- 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-2026-110652?
CVE-2026-110652 is a medium-severity server-side request forgery vulnerability in ONLYOFFICE DocumentServer, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ONLYOFFICE DocumentServer before 10.0.0 contains an unauthenticated server-side request forgery vulnerability in the /downloadfile/:docid endpoint that allows remote attackers to bypass the private-IP request-filtering-agent by exploiting the isInJwtToken flag when JWT verification is disabled in the default configuration. Attackers can submit a crafted request body containing an internal or loopback URL, which is treated as a DIRECT request skipping private-address filtering, causing the server to fetch and proxy back arbitrary private-network and cloud metadata content.
Weakness: CWE-918
Which versions are affected by CVE-2026-110652?
How do I fix CVE-2026-110652?
No fix has been published for CVE-2026-110652 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-2026-110652 being exploited?
There is no known exploitation of CVE-2026-110652 in the wild and no public exploit code.
Sources
Also known as GHSA-hfqc-w8rp-668p.