What is CVE-2025-59058?

CVE-2025-59058 is a medium-severity vulnerability in Junkurihara Httpsig-rs, classified under CWE-208. CVSS score: 5.9/10. Published 2025-09-12.

How severe is CVE-2025-59058?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2025-59058 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Junkurihara Httpsig-rs

CVE-2025-59058

httpsig-rs is a Rust implementation of IETF RFC 9421 http message signatures. Prior to version 0.0.19, the HMAC signature comparison is not timing-safe. This makes anyone who uses HS256 signature verification vulnerable to a timing attack…

EPSS: 0.001 (17.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Junkurihara Httpsig-rs — versions < 0.0.19

Weakness classification (CWE)

CWE-208

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

https://github.com/junkurihara/httpsig-rs/security/advisories/GHSA-q7pg-9pr4-mrp2 (x_refsource_CONFIRM)
https://github.com/junkurihara/httpsig-rs/commit/fc095b6ce6043bb808f5d9c4379cf697899cb458 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-59058?: CVE-2025-59058 is a medium-severity vulnerability in Junkurihara Httpsig-rs, classified under CWE-208. CVSS score: 5.9/10. Published 2025-09-12.
How severe is CVE-2025-59058?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2025-59058 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.