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Description

Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification. As OPKSSH depends on the OpenPubkey library for authentication, this vulnerability in OpenPubkey also applies to OPKSSH versions prior to 0.5.0 and would allow an attacker to bypass OPKSSH authentication.

PUBLISHED Reserved 2025-05-13 | Published 2025-05-13 | Updated 2025-05-13 | Assigner cloudflare




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

Problem types

CWE-305: Authentication Bypass by Primary Weakness

Product status

Default status
unaffected

0.1.0 (custom)
affected

Credits

Ethan Heilman finder

References

github.com/openpubkey/opkssh

cve.org (CVE-2025-4658)

nvd.nist.gov (CVE-2025-4658)

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