CVE-2026-15685

highpriority · track · 0EPSS 0.007 · 54 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.71% (54th) EPSS

CVSS 7.5 · high

Is it mine?

4 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · zdi-disclosures@trendmicro.comexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-129US

affected products (4)

Products and version ranges known to be affected.

Ollama Ollamaall versionscert_bundDEcpe:/a:ollama:ollama:-
ollama Ollama≤ 0.7.1enisa_euvdEU
ollama ollama= 0.7.1nvdUScpe:2.3:a:ollama:ollama:*:*:*:*:*:*:*:*
PyPI ollama≤ 0.7.1-NAosvUSpkg:pypi/ollama

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2298Ollama: Schwachstelle ermöglicht Denial of ServiceDeutsch2026-07-13csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Ollama ausnutzen, um einen Denial of Service Angriff durchzuführen.
PYSEC-2026-34502026-07-13vendor · osvUS
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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv NVD CVE.org MITRE

published 2026-07-13modified 2026-07-14

references (3)

External citations — patches, advisories, analysis.

scry

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