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Vulnerabilitas in software Ollama

Vulnerabilitas in software Ollama

CVE ID

CVE-2026-103663

Publication date

08 Octobris 2026

Vendor

Ollama

Product

Ollama

Vulnerable versions

Ab 0.34.2 ad 0.35.0

Vulnerability type (CWE)

Relative Path Traversal (CWE-23)

Report source

Report to CERT Polska

Description

CERT Polska nuntium accepit de vulnerabilitate in software Ollama et in coordinatione eius revelationis participavit.

Vulnerabilitas CVE-2026-103663: Ollama vulnerabilis est ad transitus viae in /api/pull puncto ob insufficientem validationem digestorum stratum a functione digestToPath. Attacker remotus non authentificatus potest definire seriem transitus viae ut digestum stratum, causando ut malitiosum binarium extra thesaurum modelis scribatur.

Critice, si processus servitoris accessum scribendi ad /usr/lib/ollama habet (default in plerisque imaginibus Docker Ollama), attacker malitiosum file ad illam directory scribere potest. In proximo restart servitoris, file onerat et exequitur, resultans in exsecutione codicis remoti ut root.

Haec quaestio in versione 0.35.0 emendata est.

Credits

Gratias agimus Bartłomiej Dmitruk (striga.ai) pro responsabili nuntio vulnerabilitatis.

Plura de processu revelationis vulnerabilitatis coordinatae apud CERT Polska in https://cert.pl/en/cvd/ inveniuntur.

Vulnerabilitates Relatae

CVE-2026-103663 CVSS 9.4 CRITICAL Awaiting Analysis
CVE-2026-103663 - Path Traversal leading to Remote Code Execution in Ollama
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.