Medium severity5.3NVD Advisory· Published Oct 1, 2026· Updated Oct 1, 2026

CVE-2026-103261

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Tornadoweb/Tornadollm-fuzzy
Range: <6.5.9

Patches

Vulnerability mechanics

References

github.com/tornadoweb/tornado/commit/03945136ea9746eccf61caf88edae39642e59c93nvd
github.com/tornadoweb/tornado/security/advisories/GHSA-3hv7-mjh2-fv65nvd
www.vulncheck.com/advisories/tornado-before-6.5.9-denial-of-service-via-query-stringnvd

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cvss	0.345
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000