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CVE-2026-4646

🗓️ 22 May 2026 10:25:17Reported by MendType 
mend
 mend
🔗 www.mend.io👁 13 Views

Authenticated DoS in Mattermost via crafted HTTP request to PR details endpoint.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-4646
22 May 202610:25
–attackerkb
bdu_fstec
BDU FSTEC
Mattermost API Request Handler DoS
1 Jun 202600:00
–bdu_fstec
circl
Circl
CVE-2026-4646
22 May 202613:05
–circl
cnnvd
CNNVD
Mattermost security vulnerabilities
22 May 202600:00
–cnnvd
cve
CVE
CVE-2026-4646
22 May 202610:25
–cve
cvelist
Cvelist
CVE-2026-4646 Insufficient input validation in GitHub plugin API causes denial of service
22 May 202610:25
–cvelist
euvd
EUVD
EUVD-2026-31430
22 May 202610:25
–euvd
github
Github Security Blog
Mattermost doesn't validate user-supplied input in API request handlers
26 May 202613:30
–github
nvd
NVD
CVE-2026-4646
22 May 202611:16
–nvd
osv_ghsa
osv_ghsa
GHSA-RMVV-8V8W-RF7X Mattermost doesn't validate user-supplied input in API request handlers
26 May 202613:30
–osv_ghsa
Rows per page
Vulners
Node
OR
mattermostmattermostRange10.11.0–10.11.15
mattermostmattermost_serverRange10.11.0–10.11.15
mattermostmattermost_serverRange11.5.0–11.5.4
mattermostmattermostRange11.4.0–11.4.5
mattermostmattermost_serverRange11.4.0–11.4.5
mattermostmattermost_serverRange11.6.0–11.6.1
mattermostmattermostRange11.6.0–11.6.1
mattermostmattermostRange11.5.0–11.5.4

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07 Oct 2026 22:48Current
6.3Medium risk
Vulners AI Score6.3
CVSS 3.14.3
CVSS 45.3
EPSS0.0025
SSVC
13