CVE-2026-66746

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-66746
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66746.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-66746
Downstream
Related
Published
2026-07-28T16:06:18Z
Modified
2026-08-22T09:56:54Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Rouille 0.4.0 - 3.6.2 HTTP Response Splitting via Header Injection
Details

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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-113"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66746.json"
}
References

Affected packages

Git / github.com/tomaka/rouille

Affected ranges

Type
GIT
Repo
https://github.com/tomaka/rouille
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
536fa0eacaeef93168f3378a0296e3f99da7b3af
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0.4.0"
        },
        {
            "last_affected": "3.6.2"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v3.*
v3.1.0
v3.1.1
v3.2.0
v3.2.1
v3.3.0
v3.3.1
v3.4.0
v3.5.0
v3.6.0
v3.6.1
v3.6.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66746.json"