---
id: CVE-2026-103663
title: >-
  Ollama is vulnerable to path traversal in the `/api/pull` endpoint due to
  insufficient validation of layer digests by the `digestToPath` function
summary: >-
  Ollama is vulnerable to path traversal in the `/api/pull` endpoint due to
  insufficient validation of layer digests by the `digestToPath` function. An
  unauthenticated remote attacker can specify a path traversal sequence as a
  layer digest…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N'
cwe:
  - CWE-23
  - CWE-913
vendor: Ollama
product: Ollama
affected:
  - Ollama >= 0.34.2 < 0.35.0
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T20:08:45.857'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103663'
references:
  - url: 'https://cert.pl/en/posts/2026/10/CVE-2026-103663/'
    label: cvd@cert.pl
  - url: 'https://ollama.com/'
    label: cvd@cert.pl
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-08T14:04:06.230233Z'
cvssSource: cna
ingestedAt: '2026-10-08T13:42:55.153Z'
---

## Overview

Ollama is vulnerable to path traversal in the `/api/pull` endpoint due to insufficient validation of layer digests by the `digestToPath` function. An unauthenticated remote attacker can specify a path traversal sequence as a layer digest, causing a malicious binary to be written outside the model store. 

Critically if the server process has write access to `/usr/lib/ollama` (the default in most Ollama Docker images), an attacker can write the malicious file to that directory. On the next server restart, the file is loaded and executed, resulting in remote code execution as root.


This issue was fixed in version 0.35.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.