CVE-2026-34913 Revive CVE debrief

Who should care

Organizations using Revive Adserver 6.0.6 and earlier versions should be aware of this vulnerability, as it could impact the security of their advertising campaigns and user data. Specifically, low-privileged users with access to the campaign-trackers.php script may be able to manipulate campaign ownership relationships. Advertisers and administrators of Revive Adserver instances should review their configurations and ensure that appropriate access controls are in place.

Technical summary

The vulnerability in Revive Adserver 6.0.6 and earlier versions is caused by a missing access control check in the campaign-trackers.php script. This script allows linking trackers to campaigns, but it does not properly validate the ownership of these campaigns and trackers. As a result, a low-privileged user could potentially link their trackers to campaigns owned by other managers on the same instance. This could lead to unauthorized access and manipulation of campaign data. The CVSS vector for this vulnerability is CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N, indicating a Medium severity level with a score of 4.3. The vulnerability is classified under CWE-284, which involves improper access control.

Defensive priority

Given the Medium severity and potential impact of CVE-2026-34913, defenders should prioritize patching or mitigating this vulnerability. Revive Adserver instances should be updated to a version that includes the ownership validation fix. In the meantime, defenders can consider implementing additional access controls and monitoring to detect and prevent exploitation attempts.

Recommended defensive actions

• Update Revive Adserver to a version that includes the ownership validation fix.
• Review and restrict access to the campaign-trackers.php script.
• Implement additional monitoring to detect and prevent exploitation attempts.
• Verify that all campaigns and trackers are properly configured and owned by authorized users.
• Consider implementing compensating controls to limit the impact of potential exploitation.

Evidence notes

The CVE-2026-34913 vulnerability was reported through Hackerone, a bug bounty platform. The vulnerability details were provided by [email protected], and the CVE record was created and published by CVE.org. The NVD (National Vulnerability Database) also has a record of this vulnerability, providing additional details and CVSS scoring.

Official resources