CVE-2026-44957 Missing authorization in Adserver
Attackers can reassign ad entities to incorrect parents via XML-RPC API, requiring specific configurations or extensions to exploit.
- 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-2026-44957?
CVE-2026-44957 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 invoking various modify methods in the XML‑RPC API of Revive Adserver 6.0.6 and earlier. The API allowed entities to be reassigned to different parent entities, leading to inconsistent ownership relationships. This issue was exploitable only in combination with CVE‑2026‑34917 or with third‑party API extensions that expose API functionality to low‑privileged users. Access control checks have been added to validate access to parent entities in the API modify methods.
Weakness: CWE-284
Which versions are affected by CVE-2026-44957?
How do I fix CVE-2026-44957?
No fix has been published for CVE-2026-44957 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-2026-44957 being exploited?
There is no known exploitation of CVE-2026-44957 in the wild and no public exploit code.
Sources
Also known as GHSA-4c2p-w68w-9rgw.