Bug 2512613 (CVE-2026-71851)

Summary:	CVE-2026-71851 crypto-js: crypto-js: Insufficient Entropy in Cryptographic Secret Generation via Vulnerable CryptoJS Dependency Chain
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	anthomas, ehelms, fmariani, ggainey, gmalinko, janstey, jpasqual, juwatts, jwon, kaycoth, mcarlett, mdellweg, mhulan, nmoumoul, osousa, pcreech, pjindal, rchan, rhel-process-autobot, rstepani, smallamp, tcunning, tmalecek, watson-tool-maintainers, yfang
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in crypto-js. The `CryptoJS.lib.WordArray.random()` function, used for generating cryptographic secrets, employs a weak pseudorandom number generator instead of a cryptographically secure source. This significantly reduces the randomness of generated values, such as those used for cryptocurrency wallet recovery phrases. An attacker can exploit this by enumerating the limited possible outputs, potentially recovering private keys and gaining unauthorized control over associated funds in affected applications.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-07 19:21:30 UTC

crypto-js is a JavaScript library of crypto standards. Versions of crypto-js prior to 4.0.0 generate randomness in CryptoJS.lib.WordArray.random() using a custom variation of the Multiply-With-Carry pseudorandom number generator, seeded from Math.random(), instead of a cryptographically secure source. This generator was introduced in version 3.1.2-4 and remained present in nearly every 3.x release. Nominal requests for 128 or 256 bits of entropy through this function produce effective search spaces of approximately 2 to the 39th and 2 to the 47th possibilities, small enough to enumerate on commodity hardware. Downstream wallet applications that used CryptoJS.lib.WordArray.random() as the entropy source for BIP39 recovery phrases are affected, and an attacker who enumerates the reduced output space can recover the resulting private keys and control the associated funds. This issue is fixed in version 4.0.0.