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TI-2024-06330 Aliases CVE-2024-6827GHSA-hc5x-x2vx-497g

HTTP Request Smuggling in benoitc/gunicorn

Priority HIGH 72CWE-444Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 3.0 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00806 57th percentileScored 2026-11-07
Fix Partial gunicorn (PyPI): 22.0.0Red Hat: 1 advisoryRed Hat: 2 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
benoitcbenoitc/gunicornup to latest—No fix listedCNA
—gunicorn (PyPI)before 22.0.022.0.0Patch availableGHSA-hc5x-x2vx-497g
  • benoitc/gunicorn Vendorbenoitc Affected up to latest Fixed in — No fix listed CNA
  • gunicorn (PyPI) Vendor— Affected before 22.0.0 Fixed in 22.0.0 Patch available GHSA-hc5x-x2vx-497g

Remediation

  • Fix · GHSA-hc5x-x2vx-497g gunicorn (PyPI) Fixed in 22.0.0 Advisory →

Red Hat 1 advisory

  • RHSA-2025:3709 Released 2025-04-08 · Red Hat rating Important
    updated discovery container images
    • Discovery 1 for RHEL 9 discovery/discovery-server-rhel9

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
OpenShift ServerlessAffectedNo fix yet
Discovery 1 for RHEL 9Fixed RHSA-2025:3709
Quay v3Fixed—

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-6827
  2. 2026-10-03 Alias added: GHSA-hc5x-x2vx-497g

References

Advisory 1

Other 6

  • TI-2026-34675 Unbounded memory consumption in WebSocket client in hackney CVSS 4.0HIGH 8.7
  • TI-2026-34669 Atom table exhaustion via unrecognized URL schemes in hackney CVSS 4.0HIGH 8.7
  • TI-2026-34668 Infinite loop in Alt-Svc header parser in hackney CVSS 4.0HIGH 8.7
  • TI-2026-34679 Unbounded body accumulation in HTTP/3 response loop in hackney CVSS 4.0HIGH 8.2
  • TI-2026-34673 SOCKS5 TLS upgrade ignores caller timeout in hackney CVSS 4.0HIGH 8.2
  • TI-2026-34674 CRLF injection in WebSocket upgrade request in hackney CVSS 4.0MEDIUM 6.9
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences