CVE-2026-26233mediumCWE-400

Denial of Service via HTTP/2 single packet attack on login endpoint

13Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 4.3epss 0.3%

probabilidade de exploração

0.3%top 77% das CVEs

exploração observada

nãonenhuma fonte reporta

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to rate limit login requests which allows unauthenticated remote attackers to cause denial of service (server crash and restart) via HTTP/2 single packet attack with 100+ parallel login requests.. Mattermost Advisory ID: MMSA-2025-00566

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Produtos afetados

Mattermost · Mattermost

Referências

https://mattermost.com/security-updates