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TI-2025-03413 Aliases CVE-2025-3864GHSA-9fm9-hp7p-53mf

Connection pool exhaustion in hackney

Priority LOW 14CWE-772Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-772.

Summary

Hackney fails to properly release HTTP connections to the pool after handling 307 Temporary Redirect responses. Remote attackers can exploit this to exhaust connection pools, causing denial of service in applications using the library. Fix for this issue has been included in 1.24.0 release.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00871 59th percentileScored 2026-11-07
Fix Fixed hackney (hackney): 1.24.0hackney (Hex): 1.24.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
hackneyhackneybefore 1.24.01.24.0Patch availableCNA
—hackney (Hex)before 1.24.01.24.0Patch availableGHSA-9fm9-hp7p-53mf
  • hackney Vendorhackney Affected before 1.24.0 Fixed in 1.24.0 Patch available CNA
  • hackney (Hex) Vendor— Affected before 1.24.0 Fixed in 1.24.0 Patch available GHSA-9fm9-hp7p-53mf

Remediation

  • Fix · CNA hackney (hackney) Fixed in 1.24.0
  • Fix · GHSA-9fm9-hp7p-53mf hackney (Hex) Fixed in 1.24.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-3864
  2. 2026-10-03 Alias added: GHSA-9fm9-hp7p-53mf

References

Patch 1

Advisory 2

Other 3

Sources

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