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PatchSiren cyber security CVE debrief

CVE-2026-40779 Yannick Lefebvre CVE debrief

CVE-2026-40779 is a HIGH severity vulnerability in the Link Library WordPress plugin, with a CVSS score of 7.7. The vulnerability allows contributors to delete arbitrary files in versions <= 7.8.8. The CVE was published on 2026-06-15T21:16:50.463Z and last modified on 2026-06-15T21:24:32.790Z.

Vendor
Yannick Lefebvre
Product
Link Library
CVSS
HIGH 7.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of the Link Library WordPress plugin, particularly those with contributor roles, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability is caused by a lack of proper input validation and file handling in the Link Library plugin. This allows a contributor to delete arbitrary files on the server, potentially leading to data loss and other security issues.

Defensive priority

HIGH

Recommended defensive actions

  • Update the Link Library plugin to a version greater than 7.8.8.
  • Restrict contributor roles to prevent arbitrary file deletion.
  • Monitor server logs for suspicious file deletion activity.

Evidence notes

The vulnerability was reported by Patchstack, as indicated by [ref-4](https://patchstack.com/database/wordpress/plugin/link-library/vulnerability/wordpress-link-library-plugin-7-8-8-arbitrary-file-deletion-vulnerability?_s_id=cve).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40779 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40779

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-40779 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40779

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.