CVE-2026-50739 Revive CVE debrief

Who should care

Defenders of Revive Adserver instances should be aware of this vulnerability, as it allows low-privileged users to manipulate campaign and tracker ownership. This could lead to unauthorized access or modifications to sensitive data. Users of Revive Adserver 6.0.7 and earlier should review their instances for potential exploitation.

Technical summary

The vulnerability exists in the `tracker-campaigns.php` script of Revive Adserver 6.0.7 and earlier. A low-privileged user can exploit this bypass of CVE-2026-34913 to link their trackers to campaigns owned by other managers. The vulnerability has a CVSS vector of CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N, indicating a Medium severity level. The CWE associated with this vulnerability is CWE-284.

Defensive priority

Defenders should prioritize patching Revive Adserver instances to version 6.0.8 or later. In the absence of a patch, defenders should monitor for suspicious activity related to tracker and campaign linking.

Recommended defensive actions

• Patch Revive Adserver to version 6.0.8 or later.
• Monitor for suspicious activity related to tracker and campaign linking.
• Review and adjust user privileges to prevent low-privileged users from manipulating ownership relationships.
• Implement additional logging and monitoring to detect potential exploitation attempts.
• Consider compensating controls, such as Web Application Firewalls (WAFs), to detect and prevent exploitation.

Evidence notes

The CVE record and NVD detail provide official information about the vulnerability. The HackerOne report provides additional context and potential mitigation strategies. The vulnerability is considered Medium severity, with a CVSS score of 4.3.

Official resources