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 P N N N L N 6.3 .0022 12.5 —
AFFECTED Product Versions Fixed tiny-http unspecified —
TIMELINE Jul 27 Reserved by VulnCheck Jul 28 Published (CNA: VulnCheck) Aug 13 EXPLOIT PUBLISHED — CVE-2026-66753 (tiny-http). Public exploit reference added.
tiny-http through 0.12.0 contains an HTTP header injection vulnerability that allows attackers to inject carriage return (0x0D) and line feed (0x0A) bytes into HTTP header values on both request and response sides due to insufficient validation in header parsing and serialization. Attackers can exploit this injection primitive to perform response splitting, cache poisoning, session fixation via Set-Cookie injection, security header override, and request smuggling against line-feed-tolerant backends.
| Date | Event | Detail |
|---|---|---|
| July 27, 2026 | Reserved | Reserved by VulnCheck |
| July 28, 2026 | Published | Published (CNA: VulnCheck) |
| August 13, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-66753 (tiny-http). Public exploit reference added. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| tiny-http | tiny-http | — | — | — |
Authoritative record: CVE-2026-66753 at cve.org
Vendors: tiny-http
Weaknesses: CWE-113
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-66753 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.