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Mattermost doesn't archive the channel before removing persistent notifications

🗓️ 26 May 2026 13:30:15Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 5 Views

Mattermost fails to archive the channel before removing persistent notifications, enabling server crash via timing.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-4635
22 May 202610:28
attackerkb
Circl
CVE-2026-4635
22 May 202612:47
circl
CNNVD
Mattermost 安全漏洞
22 May 202600:00
cnnvd
CVE
CVE-2026-4635
22 May 202610:28
cve
Cvelist
CVE-2026-4635 Persistent notification timing attack causing server denial of service
22 May 202610:28
cvelist
EUVD
EUVD-2026-31431
22 May 202610:28
euvd
NVD
CVE-2026-4635
22 May 202611:16
nvd
OSV
GHSA-PG7C-462J-GRXV Mattermost doesn't archive the channel before removing persistent notifications
26 May 202613:30
osv
Positive Technologies
PT-2026-42747
22 May 202600:00
ptsecurity
RedhatCVE
CVE-2026-4635
5 Jun 202619:28
redhatcve
Rows per page
Vulners
Node
mattermostmattermost-serverRange10.11.010.11.15go
OR
mattermostmattermost-serverRange11.4.011.4.5go
OR
mattermostmattermost-serverRange11.5.011.5.4go
OR

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26 Jun 2026 22:48Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.3 - 6.5
EPSS0.00172
SSVC
5