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CVE-2026-34912

MEDIUM
4.3
CVSS Score
Published: June 23, 2026 at 04:14 PM UTC
Updated: October 26, 2026 at 11:10 AM UTC
1 product affected across 1 vendorAdserver

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Adserver· Revive
90%
v ≤ 6.0.6

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://hackerone.com/reports/3650504

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMhackerone
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-284

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