Back to overview

CVE-2026-66753

LOW Exploitation: PoC
3.7
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-66753
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-27 16:27 UTC
Published
2026-07-28 15:46 UTC
Last updated
2026-07-28 19:30 UTC
Primary CWE
CWE-113
Improper Neutralization of CRLF Sequences in HTTP Headers ('…
Vendor / Product
tiny-http / tiny-http
Sources
cve.org  ·  NVD

Severity & Metrics

3.7 LOW CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
tiny-http tiny-http — 0 ≤ 0.12.0
Weakness (CWE)
CWESourceDescription
CWE-113 cna Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CVSS scores (2)
ScoreSeverityVersionSourceVector
6.3 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.7 LOW 3.1 cna CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
References (2)
Back to overview