Vulnerability · Published Oct 15, 2026 · Assigned by GitHub_M
CVE-2026-104198ZoneMinder failed token handling bypasses web authentication
Medium 5.3
In plain English
A medium-severity improper authentication in zoneminder from ZoneMinder. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).
Official description
ZoneMinder is a free, open source closed-circuit television software application. In versions 1.34.0 through 1.36.38, the web interface mishandles failed token authentication in web/includes/auth.php. validateToken() returns false when a token is malformed or has an invalid signature, but the caller assigns that value to the global $user variable; because web/index.php tests isset($user), boolean false is treated as a present user and the normal login redirect is skipped. This can dispatch views that rely on the outer authentication gate, including the zones view, which accepts an attacker-selected monitor ID and discloses monitor and zone metadata without an independent permission check. Permission helpers receive the false user value and deny privileged operations, so unauthorized state changes have not been established. This vulnerability is fixed in version 1.36.63, where conversion to ZM\User objects causes invalid token state to fail before view dispatch. Later defense-in-depth changes explicitly leave $user unset after failed token validation and reject non-ZM\User values at the web authentication gate.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | zoneminder | no fix listed | DEBIAN-CVE-2026-104198 |
| Debian:13 | zoneminder | no fix listed | DEBIAN-CVE-2026-104198 |
| Debian:14 | zoneminder | no fix listed | DEBIAN-CVE-2026-104198 |
| Ubuntu:24.04:LTS | zoneminder | no fix listed | UBUNTU-CVE-2026-104198 |
| Ubuntu:26.04:LTS | zoneminder | no fix listed | UBUNTU-CVE-2026-104198 |
| Ubuntu:26.10 | zoneminder | no fix listed | UBUNTU-CVE-2026-104198 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ZoneMinder | zoneminder | >= 1.34.0, < 1.36.63 |
Weakness: CWE-287, CWE-697 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- https://github.com/ZoneMinder/zoneminder/security/advisories/GHSA-23fj-frfw-hmcr x_refsource_CONFIRM
- https://github.com/ZoneMinder/zoneminder/commit/144a04ca4fff5fd02745ce8afc239ba5e05cf8ac x_refsource_MISC
- https://github.com/ZoneMinder/zoneminder/commit/6b94903e634fdb46cb71a48eadccf1aa14f0c2bb x_refsource_MISC
- https://github.com/ZoneMinder/zoneminder/commit/71bb186b230dbe2aba5e2f804c36810aae892088 x_refsource_MISC
- https://github.com/ZoneMinder/zoneminder/commit/95460a945ab7e5c63dc0551bdd6230a3026ceb9e x_refsource_MISC
- https://github.com/ZoneMinder/zoneminder/commit/969baa38912018b502617d09e836d0bfa57d4af6 x_refsource_MISC
- https://github.com/ZoneMinder/zoneminder/commit/d71fbb805e4695a9599498a1a2ee3b286ef41c96 x_refsource_MISC