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.
Scores
CVSS v3
5.9
EPSS
0.0003
EPSS Percentile
10.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-208
Status
published
Products (2)
crates.io/httpsig
0 - 0.0.19crates.io
junkurihara/httpsig-rs
< 0.0.19
Published
Sep 12, 2025
Tracked Since
Feb 18, 2026