CVE-2026-116516 MEDIUM

CVE-2026-116516: Insufficient length validation when parsing Zoom chat transcriptions

Vendor Mattermost

Product Mattermost

Weakness CWE-754

Published October 26, 2026

Last update October 26, 2026

View on NVD All CVEs

CVSS base score

6.5/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality None

Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

October 26, 2026 CVE published

October 26, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-116516 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/754.html AskarLabs — CWE-754 write-up Improper Check for Unusual or Exceptional Conditions

Related vulnerabilities

Identifiers

CVE CVE-2026-116516

CWE CWE-754

CVSS 6.5 / MEDIUM

Affected versions