Crypt::ScryptKDF versions through 0.010 for Perl uses insecure random number source when no CSPRNG module is available

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Summary

CVECVE-2026-8647
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-26 23:16:21 UTC
Updated2026-05-28 16:16:30 UTC
DescriptionCrypt::ScryptKDF versions through 0.010 for Perl uses insecure random number source when no CSPRNG module is available. The random_bytes function fell back to using the built-in rand() function when none of the Perl modules Crypt::PRNG, Crypt::OpenSSL::Random, Net::SSLeay, Crypt::Random, or Bytes::Random::Secure were available.

Risk And Classification

Primary CVSS: v3.1 4.8 MEDIUM from ADP

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS: 0.000360000 probability, percentile 0.109880000 (date 2026-06-02)

Problem Types: CWE-338 | CWE-338 CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED4.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary4.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA MIK CryptScryptKDF affected 0.010 custom Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2026/05/26/8 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
metacpan.org/release/MIK/Crypt-ScryptKDF-0.011/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
metacpan.org/release/MIK/Crypt-ScryptKDF-0.011/diff/MIK/Crypt-ScryptKDF-0.010 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2026-05-13T00:00:00.000ZIssue reported to CPANSec
CNA2026-05-14T00:00:00.000ZIssue reported to maintainer
CNA2026-05-16T00:00:00.000ZVersion 0.011 with fix released.

Solutions

CNA: Upgrade to version 0.011 or later.

Workarounds

CNA: Install one of the recommended Perl modules, such as Crypt::PRNG.

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