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  5. CVE-2024-6827

CVE-2024-6827: Gunicorn HTTP Request/Response Smuggling vulnerability

March 20, 2025 (updated March 21, 2025)

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.

References

  • github.com/advisories/GHSA-hc5x-x2vx-497g
  • github.com/benoitc/gunicorn
  • github.com/benoitc/gunicorn/issues/3278
  • huntr.com/bounties/1b4f8f38-39da-44b6-9f98-f618639d0dd7
  • nvd.nist.gov/vuln/detail/CVE-2024-6827

Code Behaviors & Features

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Affected versions

All versions before 23.0.0

Fixed versions

  • 23.0.0

Solution

Upgrade to version 23.0.0 or above.

Impact 7.5 HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Source file

pypi/gunicorn/CVE-2024-6827.yml

Spotted a mistake? Edit the file on GitLab.

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