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CVE-2026-4601

Quick assessment

Affected
n/a jsrsasign
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

jsrsasign是Kenji Urushima个人开发者的一个签名验证库。 jsrsasign 11.1.1之前版本存在安全漏洞，该漏洞源于DSA签名实现中缺少加密步骤，可能导致私钥泄露。

CVSS 8.7 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1552.003 · Shell History

Affected Version Matrix 2

VendorProduct Version RangeStatus
n/a jsrsasign < 11.1.1 affected
n/a org.webjars.npm:jsrsasign < * affected
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I. Basic Information for CVE-2026-4601

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
缺少必要的密码学步骤
Source: CVE Program / CVE List V5
Vulnerability Title
jsrsasign 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
jsrsasign是Kenji Urushima个人开发者的一个签名验证库。 jsrsasign 11.1.1之前版本存在安全漏洞，该漏洞源于DSA签名实现中缺少加密步骤，可能导致私钥泄露。
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
- jsrsasign 0 ~ 11.1.1 -
- org.webjars.npm:jsrsasign 0 ~ * -

II. Public POCs for CVE-2026-4601

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7511 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-4601

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Patches & Fixes for CVE-2026-4601 (2)

Vendor Advisories for CVE-2026-4601 (2)

Proof of Concept for CVE-2026-4601 (1)

Same Patch Batch · n/a · 2026-03-23 · 20 CVEs total

CVE-2026-4599 9.1 CRITICAL jsrsasign 安全漏洞
CVE-2026-4598 7.5 HIGH jsrsasign 安全漏洞
CVE-2026-4602 7.5 HIGH jsrsasign 安全漏洞
CVE-2026-4600 7.4 HIGH jsrsasign 安全漏洞
CVE-2026-4603 5.9 MEDIUM jsrsasign 安全漏洞
CVE-2026-4587 3.7 LOW HybridAuth SSL Curl.php certificate validation
CVE-2026-30006 XnSoft Nconvert 安全漏洞
CVE-2025-52204 Znuny 安全漏洞
CVE-2024-46879 Tiki 安全漏洞
CVE-2024-46878 Tiki 安全漏洞
CVE-2024-51224 PHPGurukul Vehicle Record Management System 安全漏洞
CVE-2026-30007 XnSoft Nconvert 安全漏洞
CVE-2026-24516 Droplet Agent 安全漏洞
CVE-2026-26829 OwnTone 安全漏洞
CVE-2026-26828 OwnTone 安全漏洞
CVE-2024-51222 PHPGurukul Vehicle Record Management System 安全漏洞
CVE-2024-51226 PHPGurukul Vehicle Record Management System 安全漏洞
CVE-2024-51223 PHPGurukul Vehicle Record Management System 安全漏洞
CVE-2024-51225 PHPGurukul Vehicle Record Management System 安全漏洞

IV. Related Vulnerabilities

Same product: jsrsasign
Same vendor: n/a
Same weakness: CWE-325

V. Comments for CVE-2026-4601

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