CVE-2023-40580: Freighter mnemonic phrase may be accessed by Javascript through a private API

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-08-25 · updated 2026-06-17
Weakness: CWE-200

Description

Freighter is a Stellar chrome extension. It may be possible for a malicious website to access the recovery mnemonic phrase when the Freighter wallet is unlocked. This vulnerability impacts access control to the mnemonic recovery phrase. This issue was patched in version 5.3.1.

Affected products

stellar freighter: before 5.3.1 — fixed in 5.3.1

How to fix

Upgrade to a fixed version: stellar freighter 5.3.1. Check the vendor advisory for mitigations.

References

https://github.com/stellar/freighter/commit/81f78ba008c41ce631a3d0f9e4449f4bbd90baee
https://github.com/stellar/freighter/pull/948
https://github.com/stellar/freighter/security/advisories/GHSA-vqr6-hwg2-775w
https://github.com/stellar/freighter/commit/81f78ba008c41ce631a3d0f9e4449f4bbd90baee
https://github.com/stellar/freighter/pull/948
https://github.com/stellar/freighter/security/advisories/GHSA-vqr6-hwg2-775w

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