# CVE-2026-78397: Link Library WordPress plugin SSRF via reciprocal link validation

Source: https://junglewise.ai/threats/cve-2026-78397-the-link-library-wordpress-plugin-before-7-9-6-does-not-validate  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-25. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-78397 · Severity: medium · CVSS 4 · Published 2026-09-25

The Link Library WordPress plugin contains a flaw that allows unauthenticated visitors to exploit a reciprocal link validation feature to make the web server issue requests to internal network hosts. An attacker can use this to probe for the existence of internal services and potentially extract sensitive information from responses, without needing to authenticate or have special permissions.

Technologies: [Link Library](https://junglewise.ai/threats/technologies/link-library). Vendors: [Link Library](https://junglewise.ai/threats/vendors/link-library).

## Quick answers

**Is CVE-2026-78397 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-78397 being exploited in the wild.

**How severe is CVE-2026-78397?** Medium severity, with a CVSS score of 4, published 25 September 2026.

**Which products and versions are affected?** Link Library 7.8.8 through 7.9.5.

**Is there a fix for CVE-2026-78397?** A patch was published on 2026-09-25: Fixed in version 7.9.6 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-78397 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-78397?** Check whether you run Link Library at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is an unauthenticated server-side request forgery (SSRF) in the reciprocal link validation feature. The plugin fails to properly validate user-supplied URLs before falling back to an unprotected fetch when its initial safe request is rejected, enabling attackers to target internal network addresses. Exploitation requires the site owner to have publicly enabled the link submission form with reciprocal-link validation.

## Affected products

- Link Library Link Library 7.8.8 through 7.9.5

## Timeline

- 2026-09-23: disclosed
- 2026-09-25: patched: Fixed in version 7.9.6

## References

- [https://wpscan.com/vulnerability/7842ef44-582c-40a8-8f3c-cf8abebaf7fb/](https://wpscan.com/vulnerability/7842ef44-582c-40a8-8f3c-cf8abebaf7fb/)

## Related threats

- [WordPress Link Library arbitrary file deletion](https://junglewise.ai/threats/cve-2026-18855-wordpress-link-library-arbitrary-file-deletion)
- [Link Library arbitrary file deletion in WordPress plugin](https://junglewise.ai/threats/cve-2026-40779-link-library-arbitrary-file-deletion-in-wordpress-plugin)