CVE-2025-4658

CRITICAL

OpenPubkey < 0.10.0 and OPKSSH < 0.5.0 - Authentication Bypass via JWS Signature Verification

Title source: llm

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.

References (1)

Core 1

Core References

Product

https://github.com/openpubkey/opkssh

Scores

CVSS v3 9.8

EPSS 0.0029

EPSS Percentile 21.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-305 CWE-347

Status published

Products (3)

openpubkey/openpubkey < 0.10.0

openpubkey/opkssh < 0.5.0

openpubkey/opkssh 0 - 0.5.0Go

Published May 13, 2025

Tracked Since Feb 18, 2026