CVE-2026-50739 Missing authorization in Adserver
Low-privileged users can improperly link their trackers to campaigns owned by other managers, violating ownership controls 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-2026-50739?
CVE-2026-50739 is a medium-severity missing authorization vulnerability in Revive-Adserver Revive Adserver, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A bypass for CVE‑2026‑34913 exists with proper ownership validation that had not been applied to the reverse operation of linking campaigns and trackers through the `tracker-campaigns.php` script in Revive Adserver 6.0.7 and earlier. As a result, a low‑privileged user could link their trackers to campaigns owned by other managers on the same instance, leading to inconsistent ownership relationships.
Weakness: CWE-284
Which versions are affected by CVE-2026-50739?
It affects 1 product.
Products include Revive-Adserver Revive Adserver.
How do I fix CVE-2026-50739?
No fix has been published for CVE-2026-50739 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-2026-50739 being exploited?
There is no known exploitation of CVE-2026-50739 in the wild and no public exploit code.
Other vulnerabilities in Revive-Adserver Revive Adserver
- CVE-2016-9124 Security feature bypass in Revive Adserver All versions before 3.2.3
- CVE-2016-9125 Auth bypass in Revive Adserver All versions before 3.2.3
- CVE-2017-5830 Deserialization in n/a
- CVE-2016-9470 Other in Revive Adserver All versions before 3.2.5 and 4.0.0
- CVE-2026-50741 Code injection in Adserver
Sources
Also known as GHSA-v78r-pfp2-f4c7.