CVE-2026-8647: Crypt::ScryptKDF versions through 0.010 for Perl uses insecure random number source when no CSPRNG module is available

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-26 · updated 2026-07-23
Weakness: CWE-338

Description

Crypt::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.

Affected products

MIK Crypt::ScryptKDF: through 0.010

References

https://metacpan.org/release/MIK/Crypt-ScryptKDF-0.011/changes
https://metacpan.org/release/MIK/Crypt-ScryptKDF-0.011/diff/MIK/Crypt-ScryptKDF-0.010#lib/Crypt/ScryptKDF.pm
http://www.openwall.com/lists/oss-security/2026/05/26/8

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