CVE-2024-12886: Github.com/ollama/ollama Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-v464-r2r9-www7
Share
CVSS 7.5
CWE-409 CWE-400
Published
Advisory Summary

CVE-2024-12886 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)) affecting Github.com/ollama/ollama libraries in the Go ecosystem. The issue involves ollama vulnerable to denial of service (dos) via crafted gzip. Remediation is available in the latest vendor maintenance releases.

CVE-2024-12886 at a Glance

CVE Identifier CVE-2024-12886
GHSA Identifier GHSA-v464-r2r9-www7
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
Affected Product Github.com/ollama/ollama
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

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

How to Fix CVE-2024-12886

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-2024-12886, 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-409: Improper Handling of Highly Compressed Data (Data Amplification), where the product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output. 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

An Out-Of-Memory (OOM) vulnerability exists in the `ollama` server version 0.3.14. This vulnerability can be triggered when a malicious API server responds with a gzip bomb HTTP response, leading to the `ollama` server crashing. The vulnerability is present in the `makeRequestWithRetry` and `getAuthorizationToken` functions, which use `io.ReadAll` to read the response body. This can result in excessive memory usage and a Denial of Service (DoS) condition.

CVE-2024-12886 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
≤ 0.3.14

References

NVD — CVE-2024-12886 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-12886
Github.com/ollama/ollama Source Repository REPOSITORY
https://github.com/ollama/ollama
huntr.com/bounties/f115fe52-5... WEB
https://huntr.com/bounties/f115fe52-58af-4844-ad29-b1c25f7245df

Frequently Asked Questions

What is CVE-2024-12886?
CVE-2024-12886 is a security vulnerability in Github.com/ollama/ollama involving Ollama Vulnerable to Denial of Service (DoS) via Crafted GZIP under CWE-409: Improper Handling of Highly Compressed Data (Data Amplification).
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-2024-12886?
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-2024-12886?
CVE-2024-12886 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2024-12886?
CVE-2024-12886 is classified under CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) (The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.).
How can I check Go dependencies for CVE-2024-12886?
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-v464-r2r9-www7",
  "modified" : "2025-03-21T17:25:07Z",
  "published" : "2025-03-20T12:32:44Z",
  "aliases" : [ "CVE-2024-12886" ],
  "summary" : "Ollama Vulnerable to Denial of Service (DoS) via Crafted GZIP",
  "details" : "An Out-Of-Memory (OOM) vulnerability exists in the `ollama` server version 0.3.14. This vulnerability can be triggered when a malicious API server responds with a gzip bomb HTTP response, leading to the `ollama` server crashing. The vulnerability is present in the `makeRequestWithRetry` and `getAuthorizationToken` functions, which use `io.ReadAll` to read the response body. This can result in excessive memory usage and a Denial of Service (DoS) condition.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/ollama/ollama"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.3.14"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-12886"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ollama/ollama"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/f115fe52-58af-4844-ad29-b1c25f7245df"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-409" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-03-21T17:25:07Z",
    "nvd_published_at" : "2025-03-20T10:15:31Z"
  }
}