VulnSocial

CVE-2026-26230Disclosure(mattermost / mattermost_server)

LOWCVSS 3.8 · LOW

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Mattermost versions 10.11.x <= 10.11.10 fail to properly validate permission requirements in the team member roles API endpoint which allows team administrators to demote members to guest role. Mattermost Advisory ID: MMSA-2025-00531

mattermost CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-863

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • mattermost_server

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • 2 total mentions across 1 day

Affected systems

Vendors
mattermost
Products
mattermost_server

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-03-17: 2Technical Details · 2026-03-17: 203-17
Signal classification2 categories
Disclosure
150.0%
General
150.0%
Referenced assets2 URLs
Full discourse2 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-26230 Mattermost versions 10.11.x &lt;= 10.11.10 fail to properly validate permission requirements in the team member roles API endpoint which allows team administrators to de… https://www.cve.org/CVERecord?id=CVE-2026-26230

    Post summary

    The text announces CVE-2026-26230, noting that Mattermost versions 10.11.x <= 10.11.10 allow team administrators to bypass permission checks on the team member roles API, potentially enabling unauthorized actions.

    0000086
    56.7K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-26230 Mattermost Team Member Role Privilege Escalation in Versions 10.11.x &lt;= 10.11.10 https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-26230

    Post summary

    The note identifies a privilege escalation flaw in certain Mattermost versions, but provides minimal detail beyond basic vulnerability type and version range.

    0000049
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appmattermostmattermost_server---

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