CVE-2026-91991

Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs

MEDIUM 6.3

En bref

Source: NVD
EPSS: EPSS 0.25 % · centile 16 (2026-10-28)
État: PUBLISHED
Publiée: 2026-09-15 15:18 UTC
Mise à jour: 2026-10-08 15:26 UTC
Attribuée par: VulnCheck
Statut NVD: Deferred

Description

Tornado before 6.5.8 contains an incomplete fix for cookie attribute injection that allows attackers to inject arbitrary cookie attributes by passing capitalized or legacy keyword arguments to set_cookie. Attackers can embed semicolon-delimited data in capitalized parameters like Domain, Path, or SameSite to bypass validation and modify cookie security attributes.

Faiblesses (CWE)

CWE-113 — Découpage de réponse HTTP

Références

Scores

Version	Score	Vecteur	Évalué par
CVSS 4.0	MEDIUM 6.3	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N	VulnCheck
CVSS 3.1	MEDIUM 5.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N	VulnCheck
CVSS 4.0	MEDIUM 6.3	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	MEDIUM 5.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N	NVD · disclosure@vulncheck.com (Secondary)

Avis

GHSA-wwv5-g3v4-889x — Tornado: Incomplete fix for CVE-2026-35536: cookie attribute injection re-opened via the legacy case-insensitive `**kwargs` path in `set_cookie`

Références européennes

ENISA EUVD · EUVD-2026-78663
GCVE · GCVE-0-2026-91991

Produits affectés

Produit	Versions
tornadoweb · tornado	affected 6.5.5 < 6.5.8 ; unaffected 6.5.8

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD