CVE-2026-8647: MIK Crypt::ScryptKDF · Use of Cryptographically Weak Pseudo-Random Number Generator
Affects MIK Crypt::ScryptKDFSource CVE Database V5
Not known to be exploited · CVSS 4.8 Medium.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 26 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| MIKCrypt::ScryptKDF | Affected
| Fixed in– |
GitHubCrypt-ScryptKDFpkg:github/Crypt-ScryptKDFOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users should ensure that at least one supported CSPRNG Perl module (e.g., Crypt::PRNG, Crypt::OpenSSL::Random, Net::SSLeay, Crypt::Random, or Bytes::Random::Secure) is installed and available in their environment to avoid fallback to the insecure rand() function. Monitor the vendor advisory for updates regarding an official fix.
Description
CVE-2026-8647 is a medium severity vulnerability in the Perl module Crypt::ScryptKDF versions through 0.010. The module uses an insecure random number source when no cryptographically secure pseudo-random number generator (CSPRNG) module is available. Specifically, the random_bytes function falls back to the built-in rand() function, which is not cryptographically secure. This weakness can reduce the effectiveness of cryptographic operations relying on this module.