The Patching Friars' AlmanacA calendar of CVE saints

Patron of July 5

Ill BloomHoly card for ill-bloom, generated with AI (Claude, Anthropic) for the Lunario dei Frati Patchatori.CC BY-NC-SA 4.0 Ill Bloom SEMEN CORRUPTUM
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Blessed Ill Bloom, Who Flowered From Faulty Seeds

Patron of software wallets, weak randomness generators, and recovery phrases born badly.

Life

In 2026 Coinspect revealed Ill Bloom: some wallet apps had generated their recovery phrases with a faulty random number generator from an old library. The seeds, too predictable, gave guessable keys, and the funds of many users across several blockchains were drained. Updating the app was not enough: you had to create a new wallet from a sound seed and move everything there.

Prayer

O Blessed Ill Bloom, who makes keys blossom from poisoned seeds, grant our wallets a randomness worthy of the name. Amen.

How to celebrate

Celebrated by creating a new wallet with a recovery phrase from trustworthy sources, and abandoning forever the one born faulty.

Faulty seed, poisoned flower.

Technical record

Disclosed on
July 5 2026
CVE
CVE-2026-71851
CVSS
9.0
Product
brix · crypto-js

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.

Sources: illbloom.org · x.com

Canonized during the vacant see

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Same year: 2026

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