Vulnerability 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 Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/theopaid/HTTP-Header-Injection-via-Unvalidated-CR-and-LF-in-H
- https://www.vulncheck.com/advisories/tiny-http-http-response-splitting-via-heade
FAQ
What is CVE-2026-66753?
CVE-2026-66753 is a vulnerability with a CVSS score of 3.7 (LOW). 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 r...
How severe is CVE-2026-66753?
CVE-2026-66753 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-66753?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.