PT-2026-62107 · Trezor · Safe 3+2

CVE-2026-65058 · Published 2026-07-21 · Updated 2026-07-21

NVD

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Trezor Safe 3, Safe 5, and Safe 7 firmware contains a confirmation-binding flaw in the Ethereum sign tx / sign tx eip1559 flow. For contract interactions, the device confirms only the initial calldata chunk while the signature commits to the full streamed calldata. An attacker could present calldata to a victim then supply a different tail that changes the signed transaction. Fixed in 70c9b0c.

Fix

Improperly Implemented Security Check for Standard

Weakness Enumeration

CWE-358

Related Identifiers

CVE-2026-65058

Affected Products

Safe 3

Safe 5

Safe 7

References · 4

• https://github.com/trezor/trezor-firmware/commit/70c9b0c07748 · Patch
• https://cve.org/CVERecord?id=CVE-2026-65058 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-65058 · Security Note
• https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-202-02.json · Note