Vulnerability DatabaseCVE-2026-5132
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CVE-2026-5132
Published:September 14, 2026
Updated:September 22, 2026
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
Affected Packages
https://github.com/mattermost/mattermost-plugin-calls.git (GITHUB):
Affected version(s) >=v0.2.0 <v1.12.2
Fix Suggestion:
Update to version v1.12.2
github.com/mattermost/mattermost-plugin-calls (GO):
Affected version(s) >=v0.2.0 <v1.12.2
Fix Suggestion:
Update to version v1.12.2
Related Resources (2)
https://nvd.nist.gov/vuln/detail/CVE-2026-5132
https://mattermost.com/security-updates
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Improper Handling of Highly Compressed Data (Data Amplification)
CWE-409
EPSS
Base Score:
0.24