CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NCVE-2021-22959
Medium (6.5). EPSS 3.2% chance of exploitation in the next 30 days.
The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp < v2.1.4 and < v6.0.6.
Severity
- EPSS
- 3.2% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
- CWE
- CWE-444
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- llhttp:llhttp
- oracle:graalvm