CVE-2026-4646

EPSS 0.25%
Veröffentlicht 22.05.2026 10:25:17
Zuletzt bearbeitet 23.07.2026 16:10:00
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Insufficient input validation in GitHub plugin API causes denial of service

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate user-supplied input in API request handlers which allows an authenticated attacker to crash the plugin process via a crafted HTTP request to the PR details endpoint.. Mattermost Advisory ID: MMSA-2026-00638

Betroffene Produkte Warnungen 0 Metriken 2 CWE 1 Referenzen 4

NVD 4 VulnDex Vulnerability Enrichment 1

Daten sind bereitgestellt durch National Vulnerability Database (NVD)

Mattermost ≫ Mattermost Server Version >= 10.11.0 < 10.11.15

Mattermost ≫ Mattermost Server Version >= 11.4.0 < 11.4.5

Mattermost ≫ Mattermost Server Version >= 11.5.0 < 11.5.4

Mattermost ≫ Mattermost Server Version >= 11.6.0 < 11.6.1

VulnDex Vulnerability Enrichment

Diese Information steht angemeldeten Benutzern zur Verfügung.

Zu dieser CVE wurde keine Warnung gefunden.

EPSS Metriken
Typ	Quelle	Score	Percentile
EPSS	FIRST.org	0.25%	0.16

CVSS Metriken
Quelle	Base Score	Exploit Score	Impact Score	Vector String
responsibledisclosure@mattermost.com	4.3	2.8	1.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-1287 Improper Validation of Specified Type of Input

The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.

https://mattermost.com/security-updates

Vendor Advisory

https://nvd.nist.gov/vuln/detail/CVE-2026-4646

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2026-4646

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2026-4646

EUVD

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CVE-2026-4646