PT-2026-65517 · Tomaka · Rouille

Theodosis Paidakis · CVE-2026-66746 · Published 2026-07-28 · Updated 2026-07-28

NVD

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Rouille 0.4.0 through 3.6.2 contains an HTTP response splitting vulnerability that allows remote attackers to inject arbitrary response headers by embedding carriage return (0x0D) or line feed (0x0A) bytes into attacker-controlled input. Attackers can exploit percent-decoded query parameters reflected into response headers or inject bare LF characters into Cookie header values that are interpolated directly into Set-Cookie response headers, enabling cache poisoning, session fixation, and security header override attacks such as bypassing CSP or CORS policies.

Exploit

Fix

Weakness Enumeration

CWE-113

Related Identifiers

CVE-2026-66746

Affected Products

Rouille

References · 3

• 🔥 https://github.com/theopaid/HTTP-Response-Splitting-via-Unvalidated-Response-Header-Values-rouille- · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-66746 · Security Note
• https://vulncheck.com/advisories/rouille-http-response-splitting-via-header-injection · Note