CVE-2025-3864

Description

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.

Is your site exposed to CVE-2025-3864?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-772 CWE-772

References

Other References

https://cert.pl/en/posts/2025/05/CVE-2025-3864/ https://github.com/benoitc/hackney/commit/8f13ddac50d1626f8b9a47a08bd599e4efe1773d https://github.com/benoitc/hackney/issues/717

Frequently Asked Questions

What is 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.

How do I check if I'm vulnerable to CVE-2025-3864? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-45287

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to version 0.0.17, `go.opentelemetry.io/otel/schema/v1.0` and `go.opentelemetry.io/otel/schema/v1.1` leaks one file descriptor on each …

CVE-2026-69664

Missing Release of Resource after Effective Lifetime vulnerability in Erlang/OTP inets httpd allows an unauthenticated remote attacker to cause denial …

CVE-2026-35227

An unauthenticated remote attacker may exhaust all available TCP connections in the CODESYS Modbus TCP Server stack if a race …

CVE-2026-71380

Missing Release of Resource after Effective Lifetime vulnerability in Erlang/OTP inets httpd allows an unauthenticated remote attacker to cause denial …

CVE-2025-65947

thread-amount is a tool that gets the amount of threads in the current process. Prior to version 0.2.2, there are …

CVE-2024-2398 8.6

When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the …