How severe is CVE-2025-59058?

CVE-2025-59058 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2025-59058 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-59058?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-59058 have an EU (EUVD) identifier?

Yes. CVE-2025-59058 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29041.

When was CVE-2025-59058 published?

CVE-2025-59058 was published on 2025-09-12 and last updated on 2026-06-17.

CVE-2025-59058

CVE-2025-59058 is a medium-severity vulnerability with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-208.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-29041
Weakness: CWE-208
Published: 2025-09-12
Last modified: 2026-06-17

Description

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 that allows the attacker to forge a signature. Version 0.0.19 fixes the issue.

Frequently asked questions

What is 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 that allows the attacker to forge a signature. Version 0.0.19 fixes the issue.
How severe is CVE-2025-59058?: CVE-2025-59058 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2025-59058 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-59058?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-59058 have an EU (EUVD) identifier?: Yes. CVE-2025-59058 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29041.
When was CVE-2025-59058 published?: CVE-2025-59058 was published on 2025-09-12 and last updated on 2026-06-17.

References

Other CWE-208 vulnerabilities

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