PYSEC-2026-2287

vendorUSosv

view advisory published 2026-04-03Licence: CC-BY-4.0

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-35536US	medium5.3	0.24% (15th)	—	2026-04-03
In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characte…

references

External citations — patches, advisories, analysis.

https://github.com/advisories/GHSA-fqwm-6jpj-5wxcADVISORY
https://github.com/tornadoweb/tornado/releases/tag/v6.5.5WEB
https://github.com/tornadoweb/tornado/security/advisories/GHSA-78cv-mqj4-43f7ADVISORY

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