tiny-http through 0.12.0 contains an HTTP header injection vulnerability that allows attackers to inject carriage return (0x0D) and line feed (0x0A)… (CVE-2026-66753)
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.
tiny-http through 0.12.0 contains an HTTP header injection vulnerability that allows attackers to inject carriage return (0x0D) and line feed (0x0A)… (CVE-2026-66753)
Description
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.
CVSS v4.0
Weaknesses
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5wm6-g4fr-88x8
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-66753"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6a6941dd9c2644c7f86c14d7
Added to database: 07/28/2026, 23:57:17 UTC
Last updated: 07/29/2026, 03:22:13 UTC
Views: 2
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