Vulnerability in Llhttp
CVE-2021-22960
The parse function in llhttp < 2.1.4 and < 6.0.6. ignores chunk extensions when parsing the body of chunked requests. This leads to HTTP Request Smuggling (HRS) under certain conditions.
Vulnerability class: HTTP Request Smuggling
EPSS: 0.023 (81.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Llhttp
- Nodejs Node — versions 4.0, 5.0, 6.0
- Oracle Graalvm — versions 20.3.4, 21.3.0
- Debian Debian_linux — versions 11.0
Weakness classification (CWE)
References
- support@hackerone.com (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- support@hackerone.com (Patch, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
Frequently asked questions
- What is CVE-2021-22960?
- CVE-2021-22960 is a medium-severity vulnerability in Llhttp, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 6.5/10. Published 2021-11-03.
- How severe is CVE-2021-22960?
- Medium severity. CVSS v3 base score is 6.5 out of 10.