CVE-2025-3864

Name: CVE-2025-3864
Creator: NVD / NIST
Published: 2025-05-28T12:15:19.76+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.3/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2025-3864 is a low-severity vulnerability rated 2.3/10 on the CVSS scale. 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.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 4.0

2.3/10

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.73%

49.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-772

References

Timeline

Published: May 28, 2025
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2025-3864?

How severe is CVE-2025-3864?

CVE-2025-3864 has a CVSS score of 2.3/10 (LOW severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2025-3864?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-3864?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST