Vulnerability Details CVE-2026-5132
Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to limit size of unpacked SDP messages compressed with zlib, which allows attacker to deny service or crash server via sending many SDP messages that unpack to large size.. Mattermost Advisory ID: MMSA-2026-00643
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 33.2%
CVSS Severity
CVSS v3 Score 6.5
References