CVE-2023-31290 — Trust Wallet Core before 3

Trust Wallet Core before 3.1.1, as used in the Trust Wallet browser extension before 0.0.183, allows theft of funds because the entropy is 32 bits, as exploited in the wild in December 2022 and March 2023. This occurs because the mt19937 Mersenne Twister takes a single 32-bit val

01What is this vulnerability?

Trust Wallet Core before 3.1.1, as used in the Trust Wallet browser extension before 0.0.183, allows theft of funds because the entropy is 32 bits, as exploited in the wild in December 2022 and March 2023. This occurs because the mt19937 Mersenne Twister takes a single 32-bit value as an input seed, resulting in only four billion possible mnemonics. The affected versions of the browser extension…

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-04-27T00:00:00.000Z
• Last modified: 2025-01-30T20:19:42.908Z

09References

• community.trustwallet.com — https://community.trustwallet.com/t/browser-extension-wasm-vulnerability-postmor…
• community.trustwallet.com — https://community.trustwallet.com/t/wasm-vulnerability-incident-update-and-recom…
• github.com — https://github.com/trustwallet/wallet-core/compare/3.1.0...3.1.1
• twitter.com — https://twitter.com/TrustWallet/status/1649699428733947906
• blog.ledger.com — https://blog.ledger.com/Funds-of-every-wallet-created-with-the-Trust-Wallet-brow…