httpsig-rs's HMAC verification is vulnerable to timing attack
Priority LOW 26CWE-208Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-208.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00283 20th percentileScored 2026-11-07
Fix Fixed httpsig-rs (junkurihara): 0.0.19httpsig (crates.io): 0.0.19
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| junkurihara | httpsig-rs | before 0.0.19 | 0.0.19 | Patch available | CNA |
| — | httpsig (crates.io) | before 0.0.19 | 0.0.19 | Patch available | GHSA-q7pg-9pr4-mrp2 |
- httpsig-rs Vendorjunkurihara Affected before 0.0.19 Fixed in 0.0.19 Patch available CNA
- httpsig (crates.io) Vendor— Affected before 0.0.19 Fixed in 0.0.19 Patch available GHSA-q7pg-9pr4-mrp2
Remediation
- Fix · CNA httpsig-rs (junkurihara) Fixed in 0.0.19
- Fix · GHSA-q7pg-9pr4-mrp2 httpsig (crates.io) Fixed in 0.0.19 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-59058
- 2026-10-03 Alias added: GHSA-q7pg-9pr4-mrp2
References
More junkurihara vulnerabilities
- TI-2026-21245 httpsig-hyper has Improper Digest Verification that May Allow Message Integrity Bypass CVSS 3.1HIGH 7.5
Sources
- CVE-2025-59058 · CVE Program
- CVE-2025-59058 · NVD
- FIRST EPSS
- GHSA-q7pg-9pr4-mrp2 · GitHub Advisory Database · CC BY 4.0
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