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Vulnerability in hackney open-source project
28 May 2025 | CERT Polska | #vulnerability, #warning, #cve
CVE ID CVE-2025-3864
Publication date 28 May 2025
Vendor hackney
Product hackney
Vulnerable versions All before 1.24.0
Vulnerability type (CWE) Missing Release of Resource after Effective Lifetime (CWE-772)
Report source Report to CERT Polska

Description

CERT Polska has received a report about vulnerability in hackney software and participated in coordination of its disclosure.

The vulnerability CVE-2025-3864: 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.

Credits

We thank Michał Majchrowicz, Marcin Wyczechowski, and Paweł Zdunek (members of the AFINE Team) for the responsible vulnerability report.

More about the coordinated vulnerability disclosure process at CERT Polska can be found at https://cert.pl/en/cvd/.