Vulnerability · Published Sep 11, 2026 · Assigned by GitHub_M

CVE-2026-54258Cross-monitor event media authorization bypass in direct event media endpoints

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in zoneminder from ZoneMinder. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 72.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

ZoneMinder is a free, open source closed-circuit television software application. Versions prior to 1.36.39, 1.38.4, and 1.39.11 allow an authenticated low-privileged user with coarse `Events=View` and/or `Snapshots=View` permissions to directly fetch media for events belonging to monitors they are not allowed to access. The normal UI correctly hides the restricted monitor and its events, but direct event media views accept an arbitrary `eid` and stream media from the event path without enforcing the event/monitor-level ACL. This exposes private surveillance footage across monitor boundaries. Versions 1.36.39, 1.38.4, and 1.39.11 fix the issue.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	zoneminder	no fix listed	DEBIAN-CVE-2026-54258
Debian:13	zoneminder	no fix listed	DEBIAN-CVE-2026-54258
Debian:14	zoneminder	no fix listed	DEBIAN-CVE-2026-54258
Ubuntu:24.04:LTS	zoneminder	no fix listed	UBUNTU-CVE-2026-54258
Ubuntu:26.04:LTS	zoneminder	no fix listed	UBUNTU-CVE-2026-54258
Ubuntu:26.10	zoneminder	no fix listed	UBUNTU-CVE-2026-54258

Affected products (as reported)

Vendor	Product	Versions
ZoneMinder	zoneminder	< 1.36.39>= 1.37.0, < 1.38.4>= 1.39.0, < 1.39.11

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/ZoneMinder/zoneminder/security/advisories/GHSA-vj5r-pc2v-gfwv x_refsource_CONFIRM