What’s Vulnerable › Vulnerabilities
CVE-2022-1337: OOM DoS in Mattermost image proxy
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.9% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2022-04-13 · updated 2026-06-17
- Weakness: CWE-400
Description
The image proxy component in Mattermost version 6.4.1 and earlier allocates memory for multiple copies of a proxied image, which allows an authenticated attacker to crash the server via links to very large image files.
Affected products
- Mattermost: from 5.37.0 before 5.37.9; from 6.2.0 before 6.2.5; from 6.3.0 before 6.3.5; from 6.4.0 before 6.4.2 — fixed in 5.37.9, 6.2.5, 6.3.5, 6.4.2
How to fix
Upgrade to a fixed version: Mattermost 5.37.9, 6.2.5, 6.3.5, 6.4.2. Check the vendor advisory for mitigations.
References
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