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CVE-2026-103663

MediumCVSS 6.9 / 10
Published Oct 8, 2026·Last modified Oct 9, 2026
Affected Components(8)
ollama/ollama
0.35.0-rc0
ollama/ollama
0.34.4
ollama/ollama
0.34.4-rc1
1 / 3
Description

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.

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Risk Scores
Base Score
6.9

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.

Threat Intelligence
2.7

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
0.71%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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