The keypair JavaScript library, used for generating RSA PEM keys, contains a critical flaw in its random number generation logic. When running in NodeJS, the library fails to use the platform's cryptographically secure random number generator (CSPRNG) due to a variable shadowing bug, and instead falls back to a Lehmer LCG seeded with Math.random. Compounding this, a bug in the encoding of the LCG output causes most seed bytes to be zero, resulting in extremely low entropy. This leads to the generation of identical or trivially predictable RSA key pairs, severely compromising the security of any cryptographic operations relying on these keys.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
No public activity tracked yet. Mallory keeps watching.
No public activity observed for this vulnerability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.