CVE-2026-91991

Katalog CVE

CVSS 5.4 · Medium EPSS 0,25%

Kerentanan Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting'). Skor CVSS 3.1 5.4 (Medium) menurut vulncheck.com.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

15 September 2026

Terakhir diubah

8 Oktober 2026

Status NVD

Deferred

CVSS 3.1

5.4 (Medium), sumber vulncheck.com
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

EPSS (30 hari)

0,25% peluang dieksploitasi; lebih tinggi dari 14,7% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://github.com/tornadoweb/tornado/security/advisories/GHSA-wwv5-g3v4-889x
• https://www.vulncheck.com/advisories/tornado-before-6.5.8-cookie-attribute-injection-via-capitalized-kwargs