CVE-2025-59058 httpsig-rs's HMAC verification is vulnerable to timing attack
Attackers can forge HTTP message signatures via timing attacks on HMAC verification, bypassing authentication in applications using this Rust library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-59058?
CVE-2025-59058 is a medium-severity vulnerability in junkurihara httpsig-rs, published on 12 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-208
Which versions are affected by CVE-2025-59058?
2 open source packages ship an affected version, including httpsig.
| Package | Affected | Fixed in |
|---|---|---|
httpsig crates.io | All versions | 0.0.19 |
httpsig crates.io | All versions | 0.0.19 |
How do I fix CVE-2025-59058?
Upgrade httpsig to 0.0.19 or later.
Is CVE-2025-59058 being exploited?
There is no known exploitation of CVE-2025-59058 in the wild and no public exploit code.
Sources
Also known as GHSA-q7pg-9pr4-mrp2.