High severity · published Jun 23, 2026
CVE-2026-44959
A missing validation of user input exists when saving delivery limitations in Revive Adserver 6.0.6 and earlier
8.8
CVSS
0.6%
EPSS
No
On KEV
Description
A missing validation of user input exists when saving delivery limitations in Revive Adserver 6.0.6 and earlier. A low‑privileged user could add an unexpected component parameter and inject malicious PHP code into the compiledlimitations field, which would then be executed during banner delivery. Input sanitisation has been improved to ensure that unexpected parameters are filtered out.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AD
Adserver · Revive
through 6.0.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44959
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44959
hackerone.com
https://hackerone.com/reports/3744200
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