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CVE-2026-14570— Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery

Quick assessment

Affected
TIMLEGGE Crypt::DSA
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.

timlegge Crypt::DSA是timlegge的数字签名库。 TIMLEGGE Crypt::DSA 1.22之前版本存在加密问题漏洞，该漏洞源于使用有偏见的随机生成器生成DSA签名随机数和私钥，导致私钥可被恢复。

AI Predicted 9.8 Difficulty: Moderate EPSS 0.51% · P41

Possible ATT&CK Techniques 1 AI

T1003 · OS Credential Dumping

Affected Version Matrix 1

VendorProduct Version RangeStatus
TIMLEGGE Crypt::DSA < 1.22 affected
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I. Basic Information for CVE-2026-14570

Vulnerability Information
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Vulnerability Title
Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery
Source: CVE Program / CVE List V5
Vulnerability Description
Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery. "Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values." An attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack. Keys used to sign with an affected version should be considered compromised and new keys should be generated.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
使用不充分的随机数
Source: CVE Program / CVE List V5
Vulnerability Title
TIMLEGGE Crypt::DSA 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
timlegge Crypt::DSA是timlegge的数字签名库。 TIMLEGGE Crypt::DSA 1.22之前版本存在加密问题漏洞，该漏洞源于使用有偏见的随机生成器生成DSA签名随机数和私钥，导致私钥可被恢复。
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
TIMLEGGE Crypt::DSA 0 ~ 1.22 -

II. Public POCs for CVE-2026-14570

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III. Intelligence Information for CVE-2026-14570

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Patches & Fixes for CVE-2026-14570 (2)

Vendor Pages for CVE-2026-14570 (1)

IV. Related Vulnerabilities

Same product: Crypt::DSA
Same vendor: TIMLEGGE
Same weakness: CWE-330

V. Comments for CVE-2026-14570

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