The specific flaw exists within the downloadBlob function. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated array. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-27277.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Ollama | Ollama | unknown |
|
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| Vendor | Product | Confidence | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ollama | Ollama | 100% |
|
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No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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No advisories yet.
| Link | Providers |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-26-403/ |
|
Mon, 13 Jul 2026 22:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Ollama
Ollama ollama |
|
| Vendors & Products |
Ollama
Ollama ollama |
Mon, 13 Jul 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Ollama downloadBlob Improper Validation of Array Index Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Ollama. Authentication is not required to exploit this vulnerability. The specific flaw exists within the downloadBlob function. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated array. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-27277. | |
| Title | Ollama downloadBlob Improper Validation of Array Index Denial-of-Service Vulnerability | |
| Weaknesses | CWE-129 | |
| References |
| |
| Metrics |
cvssV3_0
|
MITRE
Status: PUBLISHED
Assigner: zdi
Published:
Updated: 2026-07-13T21:30:09.180Z
Reserved: 2026-07-13T21:29:52.777Z
Link: CVE-2026-15685
Vulnrichment
No data.
NVD
No data.
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-07-13T22:30:04Z