What is CVE-2026-66746?

CVE-2026-66746 is a medium-severity vulnerability in Tomaka Rouille, classified under HTTP Response Splitting. CVSS score: 5.4/10. Published 2026-07-28.

How severe is CVE-2026-66746?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in Tomaka Rouille

CVE-2026-66746

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. A…

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Tomaka Rouille — versions 0.4.0

Weakness classification (CWE)

CWE-113 — HTTP Response Splitting

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-66746?: CVE-2026-66746 is a medium-severity vulnerability in Tomaka Rouille, classified under HTTP Response Splitting. CVSS score: 5.4/10. Published 2026-07-28.
How severe is CVE-2026-66746?: Medium severity. CVSS v3 base score is 5.4 out of 10.