CVE-2026-78397: unknown link library Server-Side Request Forgery (SSRF)

Vulnerability summary

CVE-2026-78397 is a high (CVSS 7.2) Server-Side Request Forgery (SSRF) vulnerability in unknown link library. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 7.9.6.

Timeline

1. 25-09-2026
   PublishedVulnerability first disclosed.
2. 25-09-2026
   Last modifiedVulnerability information updated.

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.

• CWE-918Server-Side Request Forgery (SSRF)The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.