CVE-2026-103261

Publié : 1 octobre 2026

Modifié : 1 octobre 2026

Score CVSS

5.3

MEDIUM

Description détaillée

Tornado before 6.5.9 fails to limit the number of query string fields in HTTPServerRequest.__init__, allowing remote attackers to cause event-loop stalling by sending requests with thousands of query parameters. Attackers can send unauthenticated GET requests with unbounded query-string field counts to degrade response times for all clients sharing the same IOLoop.

Vecteur d'attaque (CVSS)

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

Références et Patchs

https://github.com/tornadoweb/tornado/commit/03945136ea9746eccf61caf88edae39642e59c93 https://github.com/tornadoweb/tornado/security/advisories/GHSA-3hv7-mjh2-fv65 https://www.vulncheck.com/advisories/tornado-before-6.5.9-denial-of-service-via-query-string

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