CVE-2026-34912 Missing authorization in Adserver
Low-privileged users can link their zones to other managers' banners or campaigns, causing inconsistent ownership relationships in Revive Adserver.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34912?
CVE-2026-34912 is a medium-severity missing authorization vulnerability in Revive Adserver, published on 23 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A missing access control check when linking banners or campaigns to a zone through the zone-include.php script of Revive Adserver 6.0.6 and earlier, or via its API allows a low‑privileged user could link their zones to banners or campaigns owned by other managers on the same instance, resulting in inconsistent ownership relationships. Ownership validation has been added to ensure that banners and campaigns can only be linked to zones managed by the same account.
Weakness: CWE-284
Which versions are affected by CVE-2026-34912?
How do I fix CVE-2026-34912?
No fix has been published for CVE-2026-34912 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-34912 being exploited?
There is no known exploitation of CVE-2026-34912 in the wild and no public exploit code.
Sources
Also known as GHSA-6g73-hr73-wjqj.