Ollama for Windows does not perform integrity or authenticity verification of downloaded update executables. Unlike other platforms, the Windows implementation of the update verification routine unconditionally returns success so no digital signature or trust validation is performed before staging or executing update payloads, enabling attacker‑supplied executables to be accepted and later executed by the application.
Critically, Ollama for Windows performs silent automatic updates, so the malicious payload may be installed automatically without user awareness.
Maintainers of this project were notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Versions from 0.12.10 to 0.17.5 were tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
Metrics
Affected Vendors & Products
References
History
Wed, 29 Apr 2026 14:15:00 +0000
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ssvc
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Wed, 29 Apr 2026 13:45:00 +0000
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Ollama
Ollama ollama |
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Ollama
Ollama ollama |
Wed, 29 Apr 2026 12:00:00 +0000
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| Description | Ollama for Windows does not perform integrity or authenticity verification of downloaded update executables. Unlike other platforms, the Windows implementation of the update verification routine unconditionally returns success so no digital signature or trust validation is performed before staging or executing update payloads, enabling attacker‑supplied executables to be accepted and later executed by the application. Critically, Ollama for Windows performs silent automatic updates, so the malicious payload may be installed automatically without user awareness. Maintainers of this project were notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Versions from 0.12.10 to 0.17.5 were tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable. | |
| Title | Missing Signature Verification for Updates in Ollama | |
| Weaknesses | CWE-494 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: CERT-PL
Published:
Updated: 2026-04-29T13:23:07.650Z
Reserved: 2026-04-25T11:31:56.229Z
Link: CVE-2026-42248
Updated: 2026-04-29T13:21:16.102Z
Status : Received
Published: 2026-04-29T12:16:18.917
Modified: 2026-04-29T12:16:18.917
Link: CVE-2026-42248
No data.
OpenCVE Enrichment
Updated: 2026-04-29T13:30:11Z