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CVE-2025-3757— Authentication Bypass in OpenPubKey

Quick assessment

Affected
OPKSSH OPKSSH
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenPubkey是OpenPubkey开源的一个OpenPubkey的参考实现。 OpenPubkey 0.10.0之前版本存在安全漏洞，该漏洞源于特制JWS可绕过签名验证。

AI Predicted 9.8 Difficulty: Easy EPSS 0.43% · P36

Possible ATT&CK Techniques 1 AI

T1556 · Modify Authentication Process
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I. Basic Information for CVE-2025-3757

Vulnerability Information
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Vulnerability Title
Authentication Bypass in OpenPubKey
Source: CVE Program / CVE List V5
Vulnerability Description
Versions of OpenPubkey library prior to 0.10.0 contained a vulnerability that would allow a specially crafted JWS to bypass signature verification.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L/AU:Y
Source: CVE Program / CVE List V5
Vulnerability Type
使用基本弱点进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
OpenPubkey 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenPubkey是OpenPubkey开源的一个OpenPubkey的参考实现。 OpenPubkey 0.10.0之前版本存在安全漏洞，该漏洞源于特制JWS可绕过签名验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OPKSSH OPKSSH Openpubkey ~ 0.9.0 -

II. Public POCs for CVE-2025-3757

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III. Intelligence Information for CVE-2025-3757

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IV. Related Vulnerabilities

Same product: OPKSSH
Same vendor: OPKSSH
Same weakness: CWE-305

V. Comments for CVE-2025-3757

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