CVE-2025-51471: Github.com/ollama/ollama Ollama Vulnerable To Cross-Domain Token Vulnerability

MODERATE
Advisory Identifier: GHSA-x9hg-5q6g-q3jr
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CVSS 6.9
CWE-345
Published
Advisory Summary

CVE-2025-51471 is a MODERATE (CVSS 6.9) ollama vulnerable to cross-domain token vulnerability (CWE-345: Insufficient Verification of Data Authenticity) affecting Github.com/ollama/ollama libraries in the Go ecosystem. The issue involves ollama vulnerable to cross-domain token exposure. Remediation is available in the latest vendor maintenance releases.

CVE-2025-51471 at a Glance

CVE Identifier CVE-2025-51471
GHSA Identifier GHSA-x9hg-5q6g-q3jr
Severity MODERATE
CVSS v3.1 Base Score 6.9
CWE Classification CWE-345: Insufficient Verification of Data Authenticity
Affected Product Github.com/ollama/ollama
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2025-51471

To remediate this vulnerability, upgrade all affected Github.com/ollama/ollama dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/ollama/ollama fixed: Latest secure release 
Upgrade github.com/ollama/ollama to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/ollama/ollama

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-51471, inspect your project dependencies for Github.com/ollama/ollama:

inspect dependencies for github.com/ollama/ollama

Analyze the terminal output to locate any version of Github.com/ollama/ollama in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-345: Insufficient Verification of Data Authenticity, where the product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data. In Github.com/ollama/ollama, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Cross-Domain Token Exposure in server.auth.getAuthorizationToken in Ollama 0.6.7 allows remote attackers to steal authentication tokens and bypass access controls via a malicious realm value in a WWW-Authenticate header returned by the /api/pull endpoint.

CVE-2025-51471 Affected Github.com/ollama/ollama Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
github.com/ollama/ollama
golang/github.com/ollama/ollama
Go
≤ 0.9.6

References

NVD — CVE-2025-51471 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-51471
Github.com/ollama/ollama Source Repository REPOSITORY
https://github.com/ollama/ollama/pull/10750
Github.com/ollama/ollama Source Repository REPOSITORY
https://github.com/ollama/ollama
Github.com/ollama/ollama Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/ollama/PYSEC-2025-147.yaml
huntr.com/bounties/94eea285-f... WEB
https://huntr.com/bounties/94eea285-fd65-4e01-a035-f533575ebdc2
Github.com/ollama/ollama Security Information SECURITY
https://www.gecko.security/blog/cve-2025-51471

Frequently Asked Questions

What is CVE-2025-51471?
CVE-2025-51471 is a security vulnerability in Github.com/ollama/ollama involving Ollama vulnerable to Cross-Domain Token Exposure under CWE-345: Insufficient Verification of Data Authenticity.
Which Github.com/ollama/ollama versions are affected?
Affected versions include releases prior to current release patches across affected packages: github.com/ollama/ollama.
What version fixes CVE-2025-51471?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/ollama/ollama affected?
Yes, github.com/ollama/ollama is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2025-51471?
CVE-2025-51471 has a CVSS v3.1 base score of 6.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N.
What CWE is associated with CVE-2025-51471?
CVE-2025-51471 is classified under CWE-345: Insufficient Verification of Data Authenticity (The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.).
How can I check Go dependencies for CVE-2025-51471?
Run the dependency tree command: 'inspect dependencies for github.com/ollama/ollama'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-x9hg-5q6g-q3jr",
  "modified" : "2026-06-06T01:02:40Z",
  "published" : "2025-07-22T21:31:15Z",
  "aliases" : [ "CVE-2025-51471" ],
  "summary" : "Ollama vulnerable to Cross-Domain Token Exposure",
  "details" : "Cross-Domain Token Exposure in server.auth.getAuthorizationToken in Ollama 0.6.7 allows remote attackers to steal authentication tokens and bypass access controls via a malicious realm value in a WWW-Authenticate header returned by the /api/pull endpoint.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/ollama/ollama"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.9.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-51471"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ollama/ollama/pull/10750"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ollama/ollama"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/ollama/PYSEC-2025-147.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/94eea285-fd65-4e01-a035-f533575ebdc2"
  }, {
    "type" : "WEB",
    "url" : "https://www.gecko.security/blog/cve-2025-51471"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-345" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-07-22T21:56:25Z",
    "nvd_published_at" : "2025-07-22T19:15:25Z"
  }
}