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CVE-2026-93846

Team admin can escalate a team member's permissions via the team member roles endpoint

LOW
3.8
CVSS Score
Published: October 26, 2026 at 03:58 PM UTC
Updated: October 26, 2026 at 04:50 PM UTC
1 product affected across 1 vendorMattermost

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Severity
LOW3.8
Exploit prediction
EPSS 0.2%

Description

Mattermost versions 11.7.x <= 11.7.10 fail to restrict which built-in roles can be assigned to a team member via the API, which allows a team admin to grant a team member permissions beyond those permitted by the configured permission scheme via the {{update-team-member-roles}} REST API.. Mattermost Advisory ID: MMSA-2026-00734

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mattermost· Mattermost
90%
11.7.0
Vendor states this is fixed in 11.11.0 (unaffected)
Vendor states this is fixed in 11.7.11 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://mattermost.com/security-updates

CVSS

3.8LOWMattermost
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-863

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