CVSS 4.0
9.0 criticalCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:NCVE-2023-54397
Critical (9.0). EPSS 0.4% chance of exploitation in the next 30 days. Fixed in tornado 6.3.3.
Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsing of Content-Length headers accepting non-standard characters. Attackers can send crafted HTTP requests with these characters to bypass proxy validation and smuggle requests when deployed behind certain proxies.
Severity
CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 31% of CVEs (scores of 2026-10-31)
- CWE
- CWE-444
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-qppv-j76h-2rpx | PyPI | tornado | <6.3.3 | 6.3.3 |