Medium severity · published Jun 26, 2026
CVE-2026-50739
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…
4.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AD
Adserver · Revive
through 6.0.7 · source: vendor
RA
Revive Adserver · Revive-adserver
before 6.0.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-50739
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-50739
Issue Tracking
https://hackerone.com/reports/3780709
More from Adserver
8.8
CVE-2026-50741
Bypass to the fix for CVE-2026-34916
8.8
CVE-2026-44959
A missing validation of user input exists when saving delivery limitations in Revive Adserver 6.0.6 and earlier
8.3
CVE-2026-34914
A missing sanitisation of user input in the zone-include.php script of Revive Adserver 6.0.6 and earlier
7.5
CVE-2023-26756
The login page of Revive Adserver v5.4.1 is vulnerable to brute force attacks
6.1
CVE-2026-50745
A missing sanitisation vulnerability exists with user input in the stats-video.php script
