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CVE-2026-116516medium6.5

Insufficient length validation when parsing Zoom chat transcriptions

Impact

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

Source excerpt · Mattermost

What to do

Update Mattermost to versions 11.10.0, 11.9.2, 11.8.6, 11.7.11 or higher.

Mattermost guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Mattermost · Mattermost

Mattermost

5 ranges
Mattermost version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

<=11.9 11.1.9 11.5.8 11.10.7.0 → through <=11.9 11.1.9 11.5.8 11.10.7.0

semver versions

unaffected

11.10.0

11.9.2

11.8.6

11.7.11

unknown

Other versions: unaffected

Original source 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

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-116516

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-754 ↗

CWE-754: Improper Check for Unusual or Exceptional Conditions

Mattermost

Related →
Contributing organizations · 2
Mattermost

Assigning organization

2026-10-26
CISA-ADP

Additional data publisher

2026-10-26

What changed

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References

1 sources
mattermost.com/security-updates
vendor-advisoryMattermost