CVE-2026-8700Network attack vector

Predictable DSA parameters via insecure seed generation

Published May 15, 2026 · Updated May 15, 2026

Insufficient entropy in Crypt::DSA before 1.20 allows attackers to predict seeds used during DSA parameter generation. Crypt::DSA::generate_params in KeyChain.pm seeds parameter generation with Perl's built-in rand, whose 32-bit seed is predictable. The public advisory does not establish a concrete attack path or demonstrate private-key recovery or signature forgery.

CVSS severity7.3
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient entropy in Crypt::DSA before 1.20 allows attackers to predict seeds used during DSA parameter generation. Crypt::DSA::generate_params in KeyChain.pm seeds parameter generation with Perl's built-in rand, whose 32-bit seed is predictable. The public advisory does not establish a concrete attack path or demonstrate private-key recovery or signature forgery.

The record

CVE
CVE-2026-8700
Published
May 15, 2026
Updated
May 15, 2026
Vendor
Timothy Legge
Product
Crypt::DSA
Classifications
CWE-331
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Timothy Legge · Crypt::DSAversion=0 <1.20

Published CVSS scores

7.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-331Insufficient Entropy

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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