---
title: "CVE-2026-7482: Ollama heap out-of-bounds read in GGUF tensor parsing leaks server process memory to unauthenticated remote attackers"
url: https://erroneo.us/security/cve/CVE-2026-7482/
description: "CVE-2026-7482 (ollama ollama): Ollama before 0.17.1 contains a heap out-of-bounds read vulnerability in the GGUF model loader. The /api/create endpoint…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-05-04
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-7482"
kev: false
cvss: 8.8
epss: 0.00713
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-7482: Ollama heap out-of-bounds read in GGUF tensor parsing leaks server process memory to unauthenticated remote attackers

**Signal:** Normal patch cycle. No exploitation signal; fix it in your next routine update if you are affected. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.7% , percentile 53: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 53% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Editorial verdict: Check exposure. Bleeding Llama: Unauthenticated Memory Leak in Ollama — A laptop running Ollama on its default localhost binding is not reachable; a server you exposed with OLLAMA_HOST=0.0.0.0 or a published Docker port is, and it should be updated and its secrets rotated.

## What it is

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 OLLAMAHOST=0.0.0.0 configuration is widely used in practice (large public-internet exposure observed).

## Affected products (CVE record)

- ollama ollama: < 0.17.1

## Severity

- Echo CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H`
- Echo CVSS 4.0: 8.8 `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`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.71% probability of exploitation activity in the next 30 days; percentile 53.

## Sources

- [ollama/ollama PR #14406 — ggml: ensure tensor size is valid (fix)](https://github.com/ollama/ollama/pull/14406)
- [Fix commit 88d57d0](https://github.com/ollama/ollama/commit/88d57d0483cca907e0b23a968c83627a20b21047)
- [ollama v0.17.1 release notes](https://github.com/ollama/ollama/releases/tag/v0.17.1)
- [CVE.org record CVE-2026-7482](https://www.cve.org/CVERecord?id=CVE-2026-7482)
- [NVD entry CVE-2026-7482](https://nvd.nist.gov/vuln/detail/CVE-2026-7482)

---
Source page: https://erroneo.us/security/cve/CVE-2026-7482/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt