Vulnerability in Llhttp
CVE-2022-35256
The llhttp parser in the http module in Node v18.7.0 does not correctly handle header fields that are not terminated with CLRF. This may result in HTTP Request Smuggling.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.027 (85.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.027 · change: +0.001
Affected products
- Llhttp
- Node.js Node — versions 4.0, 5.0, 6.0
- Node.js
- Siemens Sinec Ins — versions 1.0
- Debian Linux — versions 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/1675191 (Exploit, Third Party Advisory, Issue Tracking)
- cert-portal.siemens.com/productcert/pdf/ssa-332410.pdf (Third Party Advisory)
- www.debian.org/security/2023/dsa-5326 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-35256?
- CVE-2022-35256 is a medium-severity vulnerability in Llhttp, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 6.5/10. Published 2022-12-05.
- How severe is CVE-2022-35256?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2022-35256 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.