CVE-2026-34916 Revive Adserver CVE debrief

Who should care

Administrators and users of Revive Adserver 6.0.6 and earlier should be aware of this vulnerability and take necessary steps to mitigate it. This includes updating to a patched version and ensuring that input sanitization is properly configured. Additionally, users with low privileges should be monitored for suspicious activity.

Technical summary

The vulnerability is caused by a missing validation of user input when saving delivery limitations in Revive Adserver 6.0.6 and earlier. This allows a low-privileged user to inject malicious PHP code into the compiled limitations field on the database, which can be executed during banner delivery. The vulnerability has a CVSS score of 8.8 and is classified as HIGH. The CVSS vector is CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Defensive priority

High priority should be given to patching Revive Adserver 6.0.6 and earlier to prevent exploitation of this vulnerability. Additionally, monitoring of user activity and input sanitization should be implemented to detect and prevent suspicious activity.

Recommended defensive actions

• Update Revive Adserver to a patched version
• Implement input sanitization to prevent malicious PHP code injection
• Monitor user activity for suspicious behavior
• Restrict access to low-privileged users
• Regularly review and update security configurations

Evidence notes

The vulnerability was reported by a researcher on Hackerone and has been confirmed by the vendor. The CVE record and NVD detail provide additional information on the vulnerability. The vulnerability has a CVSS score of 8.8 and is classified as HIGH.

Official resources