CVE-2026-116516

Insufficient length validation when parsing Zoom chat transcriptions

State: Published
Severity: 6.5 Medium
Published: Oct 26, 2026
Updated: Oct 26, 2026
Reserved: Oct 26, 2026

Description

Mattermost versions <=11.9 11.1.9 11.5.8 11.10.7.0 fail to validate Zoom chat line length before slicing which allows an authenticated attacker to crash the Agents plugin via summarizing a Zoom chat transcription containing short continuation lines. Mattermost Advisory ID: MMSA-2026-00723

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	Mattermost

Weaknesses

CWE-754 Improper Check for Unusual or Exceptional Conditions

Affected Products

Product	Versions
MattermostMattermost	<=11.9 11.1.9 11.5.8 11.10.7.0 through <=11.9 11.1.9 11.5.8 11.10.7.0Affected 11.10.0Not affected 11.9.2Not affected 11.8.6Not affected 11.7.11Not affected

References

MMSA-2026-00723vendor-advisory

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