CVE-2026-86348 — MS Calendar plugin: unrecovered handler panics from malformed post-action requests could crash the plugin process
Mattermost versions <=11.9 11.0.9 11.4.8 11.7.7 10.22.11.0 fail to recover from handler panics, which allows an authenticated user to crash the plugin via a post-action request …
Published: 2026-09-14 · CVSS: 4.3 · CVSS 3.1
Mattermost versions <=11.9 11.0.9 11.4.8 11.7.7 10.22.11.0 fail to recover from handler panics, which allows an authenticated user to crash the plugin via a post-action request with an unexpected field type.. Mattermost Advisory ID: MMSA-2026-00701
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7