CVE-2026-26962
Rack's improper unfolding of folded multipart headers preserves CRLF in parsed parameter values
4.8
MEDIUM
CVSS 3.1
EPSS 0.23%
描述
Rack is a modular Ruby web server interface. From version 3.2.0 to before version 3.2.6, Rack::Multipart::Parser unfolds folded multipart part headers incorrectly. When a multipart header contains an obs-fold sequence, Rack preserves the embedded CRLF in parsed parameter values such as filename or name instead of removing the folded line break during unfolding. As a result, applications that later reuse those parsed values in HTTP response headers may be vulnerable to downstream header injection or response splitting. This issue has been patched in version 3.2.6.
如何修補 CVE-2026-26962
要修補 CVE-2026-26962,請將受影響套件升級到下列已修補版本。
- —未列出修補版本
- —升級至 3.2.6 或更新版本
CVE-2026-26962 正在被利用嗎?
低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0
- >= 3.2.0, < 3.2.6
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |