CVE-2024-6827
High
Description
Gunicorn version 21.2.0 does not properly validate the value of the 'Transfer-Encoding' header as specified in the RFC standards, which leads to the default fallback method of 'Content-Length,' making it vulnerable to TE.CL request smuggling. This vulnerability can lead to cache poisoning, data exposure, session manipulation, SSRF, XSS, DoS, data integrity compromise, security bypass, information leakage, and business logic abuse.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Gunicorn
PublishedMar 20, 2025
First seenMar 20, 2025
Weakness typeCWE-444CWE-444
How to fix
Update
- gunicorn22.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gunicornPyPI | v < 22.0.0 | 22.0.0 |
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