CVE-2026-103663Ollama Path Traversal
Path Traversal leading to Remote Code Execution in Ollama
Published Oct 8, 2026 · Updated Oct 10, 2026 · Also known as EUVD-2026-94962, GHSA-w8p2-phwr-px3r
Key Facts
Routine patching- CVE-2026-103663 is a medium-severity vulnerability (CVSS 6.9 v4) affecting Ollama.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 0.7% probability of exploitation in the next 30 days.
- Fixed versions are available, including Ollama 0.35.0, ollama/ollama 0.35.0.
- Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
Scores
CVSS v4
6.9
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
EPSS (30-day exploit likelihood)
0.7%
Higher than 52.8% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
34/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
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.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Ollama | >= 0.34.2 | 0.35.0 |
Patched Releases
Ollama
0.35.0
ollama/ollama
0.35.0
Timeline
Publicly disclosed
Oct 8, 2026
Last updated
Oct 10, 2026
Weakness Type
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- CWE-23 Relative Path Traversal
- CWE-913 Improper Control of Dynamically-Managed Code Resources
References
- advisorycert.pl · CVE-2026-103663
- advisorycve.org · CVERecord
- advisorynvd.nist.gov · CVE-2026-103663
- othergithub.com · ollama
- otherollama.com
FAQ
Common Questions.
Ollama is vulnerable to path traversal in the /api/pull endpoint due to insufficient validation of layer digests by the digestToPath function.
Affected: Ollama versions >= 0.34.2. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Ollama 0.35.0, ollama/ollama 0.35.0.
Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
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