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openssl_encrypt EUVDEUVD-2026-60106

| CVE-2026-74887 MEDIUM
Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) (CWE-338)
2026-08-17 VulnCheck GHSA-j466-q253-mxp8
6.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
6.3 CRITICAL
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
3.7 LOW

Shipped code never calls the PRNG so present impact is near-zero; I score only the latent confidentiality hazard as C:L with AC:H (needs future misuse plus ~624-output state recovery), not the published 9.3.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

5
Severity Changed
Aug 28, 2026 - 20:22 NVD
CRITICAL MEDIUM
CVSS changed
Aug 28, 2026 - 20:22 NVD
9.3 (CRITICAL) 6.3 (MEDIUM)
Analysis Generated
Aug 17, 2026 - 13:09 vuln.today
Patch available
Aug 17, 2026 - 12:01 EUVD
CVE Published
Aug 17, 2026 - 11:04 cve.org
CRITICAL 9.3

DescriptionCVE.org

openssl_encrypt before 1.4.0 imports Python's non-cryptographic 'random' module (Mersenne Twister PRNG) at line 15 of openssl_encrypt/modules/pqc.py. No direct calls to random.* were present in the code, so no cryptographic operation is currently affected; however, the import creates a hazard that future code could inadvertently use random.randint() instead of a cryptographically secure alternative (secrets/os.urandom), producing predictable values since the Mersenne Twister state can be recovered from approximately 624 outputs. Fixed by removing the import in 1.4.0.

AnalysisAI

Insecure PRNG import in the jahlives openssl_encrypt Python package (all versions before 1.4.0) places Python's non-cryptographic 'random' module (Mersenne Twister) into openssl_encrypt/modules/pqc.py, though the code makes no calls to it, so no cryptographic operation is presently weakened. VulnCheck reported this as a latent hazard: the import invites future maintainers to reach for random.randint() instead of secrets/os.urandom, which would yield predictable values recoverable from ~624 outputs. There is no public exploit identified at time of analysis and it is not on CISA KEV; the flaw was fixed by removing the import in version 1.4.0.

Technical ContextAI

The affected component is a Python cryptographic wrapper library (cpe:2.3:a:jahlives:openssl_encrypt) whose post-quantum crypto helper module (modules/pqc.py) imports the standard-library 'random' module at line 15. Python's 'random' is backed by the Mersenne Twister (MT19937) deterministic PRNG, whose full 19937-bit internal state can be reconstructed from roughly 624 consecutive 32-bit outputs, after which all future outputs are predictable. This maps to CWE-338 (Use of Cryptographically Weak PRNG): the correct primitives for key/nonce/salt generation are the 'secrets' module or os.urandom (CSPRNGs seeded from the OS entropy pool). Critically, per the description the module contains only the import with no random.* invocations, so the weakness is architectural/potential rather than an active cryptographic defect in shipped code.

RemediationAI

Upgrade to openssl_encrypt 1.4.0 or later - Vendor-released patch: 1.4.0, which removes the offending 'random' import from modules/pqc.py per the GitHub Security Advisory GHSA-cx72-m6xj-3vf6 (https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-cx72-m6xj-3vf6). Because there are no random.* calls in vulnerable versions, no functional cryptographic behavior changes on upgrade and there is no runtime compensating control needed to block exploitation of shipped code; the practical action is simply to update the dependency and, if maintaining a fork, audit the module to confirm all key/nonce/salt generation uses 'secrets' or os.urandom rather than 'random'. For organizations unable to upgrade immediately, the low real-world risk means it can be scheduled as routine dependency maintenance, while adding a static-analysis/lint rule (e.g., flag any use of the 'random' module in crypto modules) prevents the latent hazard from becoming a live one.

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EUVD-2026-60106 vulnerability details – vuln.today

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