Vulnerability · Published Sep 12, 2025 · Assigned by GitHub_M
CVE-2025-59058httpsig-rs's HMAC verification is vulnerable to timing attack
Medium 5.9
In plain English
A medium-severity security flaw in httpsig-rs from junkurihara. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.3%top 79.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| junkurihara | httpsig-rs | < 0.0.19 |
Weakness: CWE-208 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N