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PatchSiren cyber security CVE debrief

CVE-2026-39664 leadrebel CVE debrief

A Missing Authorization vulnerability in leadrebel Leadrebel (from n/a through <= 1.0.2) allows Exploiting Incorrectly Configured Access Control Security Levels, with a CVSS score of 5.3 and MEDIUM severity. This issue arises from a lack of proper authorization checks, potentially allowing unauthorized access or actions within the Leadrebel plugin. Users of affected versions should review and apply patches to prevent potential exploitation. The vulnerability's impact is considered Medium priority due to its potential for exploitation, but detailed information about its specific effects is limited.

Vendor
leadrebel
Product
Unknown
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-08
Original CVE updated
2026-07-24
Advisory published
2026-04-08
Advisory updated
2026-07-24

Who should care

Users of leadrebel Leadrebel plugin versions from n/a to 1.0.2 should review and apply patches to prevent potential exploitation. Additionally, administrators and security teams responsible for managing and securing plugin deployments should verify plugin configurations to ensure proper authorization settings and monitor for potential exploitation attempts. This includes reviewing system logs and implementing compensating controls where necessary.

Technical summary

The CVE-2026-39664 vulnerability is caused by a Missing Authorization issue in the leadrebel Leadrebel plugin. This allows for Exploiting Incorrectly Configured Access Control Security Levels. The vulnerability has a CVSS score of 5.3 and is classified as MEDIUM severity. It affects Leadrebel plugin versions from n/a through 1.0.2. The issue stems from inadequate authorization checks, which could lead to unauthorized actions or access.

Defensive priority

Medium priority for users of affected Leadrebel plugin versions due to potential for exploitation. This prioritization is based on the CVSS score and the potential impact of the vulnerability if exploited.

Recommended defensive actions

  • Review and apply patches for Leadrebel plugin versions from n/a to 1.0.2
  • Verify plugin configuration to ensure proper authorization settings
  • Monitor for potential exploitation attempts
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

Evidence from Patchstack and NVD indicates a Missing Authorization vulnerability in Leadrebel plugin versions from n/a through 1.0.2. However, detailed information about the vulnerability and its impact is limited. Defenders should verify the affected scope, review vendor guidance, and monitor for exploitation attempts. The CVE record was published on 2026-04-08T09:16:37.613Z and has not been modified since.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-08T09:16:37.613Z and has not been modified since.