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Mattermost fails to properly handle very long passwords

🗓️ 16 Mar 2026 15:30:42Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 41 Views

Mattermost fails to handle very long passwords, risking CPU and memory overload from login attempts.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-24458
16 Mar 202612:02
–attackerkb
bdu_fstec
BDU FSTEC
Mattermost DoS
13 May 202600:00
–bdu_fstec
circl
Circl
CVE-2026-24458
16 Feb 202600:00
–circl
cnnvd
CNNVD
Mattermost security vulnerabilities
16 Mar 202600:00
–cnnvd
cve
CVE
CVE-2026-24458
16 Mar 202612:02
–cve
cvelist
Cvelist
CVE-2026-24458 DoS attack via login attempts with multi-megabyte passwords
16 Mar 202612:02
–cvelist
euvd
EUVD
EUVD-2026-12405
16 Mar 202615:30
–euvd
mend
Mend
CVE-2026-24458
16 Mar 202612:02
–mend
nvd
NVD
CVE-2026-24458
16 Mar 202614:18
–nvd
osv_ghsa
osv_ghsa
GHSA-M5RV-56XX-HFC6 Mattermost fails to properly handle very long passwords
16 Mar 202615:30
–osv_ghsa
Rows per page
Vulners
Node
OR
mattermostmattermost-serverRange11.3.0-rc1–11.3.1go
mattermostmattermost-serverRange11.2.0-rc1–11.2.3go
mattermostmattermost-serverRange10.11.0-rc1–10.11.11go
mattermostmattermost-serverRange<5.3.2-0.20260129164748-7201f42d955fgo
mattermostmattermostRange<8.0.0-20260129164748-7201f42d955fgo

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17 Mar 2026 19:59Current
7High risk
Vulners AI Score7
CVSS 3.17.5
EPSS0.00283
SSVC
41