Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV N L N N P L L N 5.3 .0024 15.6 —
AFFECTED Product Versions Fixed rouille 0.4.0 – —
TIMELINE Jul 27 Reserved by VulnCheck Jul 28 Published (CNA: VulnCheck) Jul 29 EXPLOIT PUBLISHED — CVE-2026-66746 (tomaka rouille). Public exploit reference added.
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.
| Date | Event | Detail |
|---|---|---|
| July 27, 2026 | Reserved | Reserved by VulnCheck |
| July 28, 2026 | Published | Published (CNA: VulnCheck) |
| July 29, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-66746 (tomaka rouille). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| tomaka | rouille | — | 0.4.0 | — |
Authoritative record: CVE-2026-66746 at cve.org
Vendors: tomaka
Weaknesses: CWE-113
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-66746 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.