CVEvulnerability
CVE-2026-39831
9.1 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2026-05-22
- Last modified
- 2026-07-23
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.1 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weaknesses
- CWE-862
Description
The Verify() method for FIDO/U2F security key types ([email protected], [email protected]) did not check the User Presence flag. Signatures generated without physical touch were accepted, allowing unattended use of a hardware security key. To restore the previous behavior, return a "no-touch-required" extension in Permissions.Extensions from PublicKeyCallback.
Affected configurations
• golang crypto (< 0.52.0)
Related
Weakness · CWE (1)
- CWE-862 Missing Authorization weakness
References
- https://go.dev/cl/781662 Issue Tracking
- https://go.dev/issue/79566 Issue Tracking
- https://groups.google.com/g/golang-announce/c/a082jnz-LvI Mailing List
- https://pkg.go.dev/vuln/GO-2026-5019 Vendor Advisory