Search/CVE-2026-10542
● CVE — Medium

CVE-2026-10542

VendormattermostProductmattermost serverDiscoveredSep 14, 2026UpdatedOct 7, 2026

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 channel action ownership which allows channel managers to update actions in other channels via the channel action update endpoint.. Mattermost Advisory ID: MMSA-2026-00692

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CVSS v3.1
5 MEDIUM
EPSS
0.12%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Sep 16, 2026 → Oct 22, 2026
● 0.01pp
0.13% → 0.12% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityHIGH
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
ConfidentialityLOW
IntegrityLOW
AvailabilityLOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Connections
2 relationships
Timeline
disclosure → media coverage
Sep 14, 2026
Disclosure — published as a CVE record. · last revised by NVD Oct 7, 2026