CVE-2023-7345: Ledger Live hw-app-eth EIP-712 Message Parsing Integer Truncation

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-19 · updated 2026-07-24
Weakness: CWE-704

Description

Ledger Live with vulnerable versions of ledgerhq/hw-app-eth prior to 6.34.7 contains an integer parsing vulnerability that allows attackers to manipulate EIP-712 typed data messages by exploiting incorrect hexadecimal field parsing when values contain an odd number of characters. Attackers can obtain signatures on truncated or misinterpreted message values to authorize unintended blockchain transactions, such as asset transfers at incorrect amounts.

Affected products

Ledger Live: before 2.70.0 — fixed in 2.70.0
ledgerhq/hw-app-eth: before 6.34.7 — fixed in 6.34.7

How to fix

Upgrade to a fixed version: Ledger Live 2.70.0; ledgerhq/hw-app-eth 6.34.7. Check the vendor advisory for mitigations.

References

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