GHSA-m5rv-56xx-hfc6

ghsaUSosv

Mattermost fails to properly handle very long passwords

view advisory published 2026-03-16Licence: CC-BY-4.0

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly handle very long passwords, which allows an attacker to overload the server CPU and memory via executing login attempts with multi-megabyte passwords. Mattermost Advisory ID: MMSA-2026-00587

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-24458US	—	0.28% (20th)	—	2026-03-16
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to properly handle very long passwords, which allows an attacker to overload the server CPU and mem…

references

External citations — patches, advisories, analysis.

https://github.com/mattermost/mattermostPACKAGE
https://github.com/mattermost/mattermost/commit/7201f42d955f1bc44719b862132546626b60a180WEB
https://mattermost.com/security-updatesWEB
https://nvd.nist.gov/vuln/detail/CVE-2026-24458ADVISORY

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