Vulnerability-Lookup

GHSA-X8QC-FGGM-MPQG

Vulnerability from github – Published: 2026-05-04 15:31 – Updated: 2026-05-08 17:26

Summary

Ollama contains a heap out-of-bounds read vulnerability in the GGUF model loader

Details

Ollama before 0.17.1 contains a heap out-of-bounds read vulnerability in the GGUF model loader. The /api/create endpoint accepts an attacker-supplied GGUF file in which the declared tensor offset and size exceed the file's actual length; during quantization in fs/ggml/gguf.go and server/quantization.go (WriteTo()), the server reads past the allocated heap buffer. The leaked memory contents may include environment variables, API keys, system prompts, and concurrent users' conversation data, and can be exfiltrated by uploading the resulting model artifact through the /api/push endpoint to an attacker-controlled registry. The /api/create and /api/push endpoints have no authentication in the upstream distribution. Default deployments bind to 127.0.0.1, but the documented OLLAMA_HOST=0.0.0.0 configuration is widely used in practice (large public-internet exposure observed).

Severity ?

9.1 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

8.8 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:A/V:D/RE:L/U:Red

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/ollama/ollama"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.17.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-7482"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-08T17:26:00Z",
    "nvd_published_at": "2026-05-04T13:16:01Z",
    "severity": "HIGH"
  },
  "details": "Ollama before 0.17.1 contains a heap out-of-bounds read vulnerability in the GGUF model loader. The /api/create endpoint accepts an attacker-supplied GGUF file in which the declared tensor offset and size exceed the file\u0027s actual length; during quantization in fs/ggml/gguf.go and server/quantization.go (WriteTo()), the server reads past the allocated heap buffer. The leaked memory contents may include environment variables, API keys, system prompts, and concurrent users\u0027 conversation data, and can be exfiltrated by uploading the resulting model artifact through the /api/push endpoint to an attacker-controlled registry. The /api/create and /api/push endpoints have no authentication in the upstream distribution. Default deployments bind to 127.0.0.1, but the documented OLLAMA_HOST=0.0.0.0 configuration is widely used in practice (large public-internet exposure observed).",
  "id": "GHSA-x8qc-fggm-mpqg",
  "modified": "2026-05-08T17:26:00Z",
  "published": "2026-05-04T15:31:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7482"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ollama/ollama/pull/14406"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ollama/ollama/commit/88d57d0483cca907e0b23a968c83627a20b21047"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ollama/ollama"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ollama/ollama/releases/tag/v0.17.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:A/V:D/RE:L/U:Red",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Ollama contains a heap out-of-bounds read vulnerability in the GGUF model loader"
}

CVE-2026-7482 (GCVE-0-2026-7482)

Vulnerability from cvelistv5 – Published: 2026-05-04 12:38 – Updated: 2026-05-04 13:48 X_Unauthenticated X_Remote X_Information Disclosure

Title

Ollama heap out-of-bounds read in GGUF tensor parsing leaks server process memory to unauthenticated remote attackers

Summary

Severity ?

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/AU:Y/R:A/V:D/RE:L/U:Red

CWE

CWE-125 - Out-of-bounds Read

Assigner

Echo

References

3 references

URL	Tags
https://github.com/ollama/ollama/pull/14406	patch
https://github.com/ollama/ollama/commit/88d57d048…	patch
https://github.com/ollama/ollama/releases/tag/v0.17.1	release-notes

Impacted products

1 product

Vendor	Product	Version
ollama	ollama	Affected: 0 , < 0.17.1 (semver)

Date Public ?

2026-02-25 00:00

Credits

Cyera Research Team (Dor Attias, Ofek Itach)

Show details on NVD website

JSON

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                "id": "CVE-2026-7482",
                "options": [
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                    "Exploitation": "none"
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                  },
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                    "Technical Impact": "total"
                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-04T13:48:32.181054Z",
                "version": "2.0.3"
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          "dateUpdated": "2026-05-04T13:48:39.686Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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      }
    ],
    "cna": {
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            "fs/ggml/gguf.go",
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          ],
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      "credits": [
        {
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          "type": "finder",
          "value": "Cyera Research Team (Dor Attias, Ofek Itach)"
        }
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      "datePublic": "2026-02-25T00:00:00.000Z",
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        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-540",
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      "metrics": [
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            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
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            "userInteraction": "NONE",
            "valueDensity": "DIFFUSE",
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          "name": "Fix commit 88d57d0",
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        },
        {
          "name": "ollama v0.17.1 release notes",
          "tags": [
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          ],
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      "title": "Ollama heap out-of-bounds read in GGUF tensor parsing leaks server process memory to unauthenticated remote attackers",
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        }
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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GHSA-X8QC-FGGM-MPQG

CVE-2026-7482 (GCVE-0-2026-7482)

Tags

Sightings

Nomenclature