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.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Tue, 15 Sep 2026 15:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Tornado before 6.5.8 Cookie Attribute Injection via Capitalized kwargs | |
| First Time appeared |
Tornadoweb
Tornadoweb tornado |
|
| Weaknesses | CWE-113 | |
| CPEs | cpe:2.3:a:tornadoweb:tornado:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Tornadoweb
Tornadoweb tornado |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-09-15T15:18:32.408Z
Reserved: 2026-09-15T11:11:13.311Z
Link: CVE-2026-91991
No data.
Status : Received
Published: 2026-09-15T16:17:58.293
Modified: 2026-09-15T16:17:58.293
Link: CVE-2026-91991
No data.
OpenCVE Enrichment
No data.
Weaknesses