CVE-2026-11625Network attack vector

Secret prediction via forked PRNG state reuse

Published Jun 26, 2026 · Updated Jun 26, 2026

Predictable randomness in Bytes::Random::Secure 0 through 0.29 allows attackers to infer secrets generated by forked Perl processes. The bytes, _ranged_randoms, and irand paths reuse an inherited Math::Random::ISAAC instance because they do not compare the current PID with the PID that seeded it. Exposure requires a process to initialize the object before fork, or use the functional interface, causing parent and child processes to emit identical streams.

CVSS severity7.5
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable randomness in Bytes::Random::Secure 0 through 0.29 allows attackers to infer secrets generated by forked Perl processes. The bytes, _ranged_randoms, and irand paths reuse an inherited Math::Random::ISAAC instance because they do not compare the current PID with the PID that seeded it. Exposure requires a process to initialize the object before fork, or use the functional interface, causing parent and child processes to emit identical streams.

The record

CVE
CVE-2026-11625
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
David J. Oswald
Product
Bytes::Random::Secure
Classifications
CWE-335
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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?

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  1. Affected versionversion=0 <=0.29

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

David J. Oswald · Bytes::Random::Secureversion=0 <=0.29

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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-335Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

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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