vantage6 lacks brute-force protection on change password functionality

CRITICAL 9.8CVE-2025-43863 · GHSA-j6g5-p62x-58hw · PYSEC-2025-220 · Published 12/06/2025 · updated 17/06/2026

Package	Affected versions	Patched versions
vantage6 PyPI	`< 4.11.0`	`4.11.0`
vantage6 vantage6	`< 4.11.0`	`4.11.0`

Description

Impact

If attacker gets access to an authenticated session, they can try to brute-force the user password by using the change password functionality: they can call that route infinitely which will return the message that password is wrong until it is correct

Patches

This issue has been patched in version 4.11.0

Workarounds

None

NVD description

vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. If attacker gets access to an authenticated session, they can try to brute-force the user password by using the change password functionality: they can call that route infinitely which will return the message that password is wrong until it is correct. This vulnerability is fixed in 4.11.

References

vantage6/vantage6 security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2025-43863 · ADVISORY
vantage6/vantage6 commit e0f1841 · WEB
pypa/advisory-database · WEB
vantage6/vantage6 · PACKAGE

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