CVE-2025-63389: Ollama Platform has missing authentication enabling attackers to perform model management operations

CVE-2025-63389 · Severity: critical · CVSS 9.8 · Published 2025-12-18

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.

Technologies: github.com/ollama/ollama (Go), Ollama. Vendors: Go, Ollama.

Quick answers

Is CVE-2025-63389 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-63389 being exploited in the wild.
How severe is CVE-2025-63389?
Critical severity, with a CVSS score of 9.8, published 18 December 2025.
Which products and versions are affected?
github.com/ollama/ollama (Go) SEMVER:introduced=0, SEMVER:introduced=0,last_affected=0.13.5.
Is there a fix for CVE-2025-63389?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-63389?
Check whether you run github.com/ollama/ollama (Go) or Ollama at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • github.com/ollama/ollama (Go) SEMVER:introduced=0, SEMVER:introduced=0,last_affected=0.13.5
  • Ollama

Identifiers

  • CVE-2025-63389
  • GHSA-f6mr-38g8-39rg
  • GO-2025-4251

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