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Medium severity6.5NVD Advisory· Published Sep 14, 2026· Updated Oct 6, 2026

CVE-2026-9812

CVE-2026-9812

Description

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to validate that a property field belongs to the specified run before updating its value which allows an authenticated user with run property-management access to crash the Playbooks plugin via a REST request referencing a property field that belongs to a different run. Mattermost Advisory ID: MMSA-2026-00684

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3
  • Mattermost/Mattermost2 versions
    cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: >=10.11.0,<10.11.23
    • (no CPE)range: <=11.9.0, <=11.8.4, <=11.7.7, <=10.11.22
  • Mattermost/Playbook Pluginllm-fuzzy
    Range: <=11.9.0, <=11.8.4, <=11.7.7, <=10.11.22

Patches

Vulnerability mechanics

References

1

News mentions

0

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