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CVE-2026-25783

🗓️ 16 Mar 2026 14:18:23Reported by [email protected]Type 
nvd
 nvd
🔗 web.nvd.nist.gov👁 22 Views

Mattermost fails to validate User-Agent tokens, enabling an authenticated attacker to trigger a request panic.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-25783
16 Mar 202612:04
–attackerkb
bdu_fstec
BDU FSTEC
Mattermost DoS
13 May 202600:00
–bdu_fstec
circl
Circl
CVE-2026-25783
16 Feb 202600:00
–circl
cnnvd
CNNVD
Mattermost security vulnerabilities
16 Mar 202600:00
–cnnvd
cve
CVE
CVE-2026-25783
16 Mar 202612:04
–cve
cvelist
Cvelist
CVE-2026-25783 Denial of service via malformed User-Agent header in getBrowserVersion
16 Mar 202612:04
–cvelist
euvd
EUVD
EUVD-2026-12416
16 Mar 202615:30
–euvd
github
Github Security Blog
Mattermost fails to properly validate User-Agent header tokens
16 Mar 202615:30
–github
mend
Mend
CVE-2026-25783
16 Mar 202612:04
–mend
osv_ghsa
osv_ghsa
GHSA-2V3W-6G35-5F9V Mattermost fails to properly validate User-Agent header tokens
16 Mar 202615:30
–osv_ghsa
Rows per page
NVD
Node
OR
mattermostmattermost_serverRange10.11.0–10.11.11
mattermostmattermost_serverRange11.2.0–11.2.3
mattermostmattermost_serverRange11.3.0–11.3.1

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