CVE-2026-78397 Link Library < 7.9.6 - Unauthenticated SSRF via Reciprocal Link Validation
Unauthenticated attackers can exploit SSRF in Link Library plugin to access internal network services and gather response data.
- 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-2026-78397?
CVE-2026-78397 is a medium-severity server-side request forgery vulnerability in Unknown Link Library, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Link Library WordPress plugin before 7.9.6 does not validate the destination of a user-supplied URL before falling back to an unprotected fetch when its safe request is rejected, allowing unauthenticated visitors to make the site issue requests to hosts on its internal network and to learn from the response whether an internal service answered.
Versions below 7.8.8 are covered by CVE-2025-68600; this entry covers 7.8.8 through 7.9.5, where that fix was incomplete. Exploitation requires the site owner to have published the Link Library WordPress plugin before 7.9.6's public link submission form with reciprocal-link validation enabled.
Weakness: CWE-918
Which versions are affected by CVE-2026-78397?
How do I fix CVE-2026-78397?
No fix has been published for CVE-2026-78397 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-2026-78397 being exploited?
There is no known exploitation of CVE-2026-78397 in the wild and no public exploit code.
Sources
Also known as GHSA-6rpr-h6cv-7xm2.