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TI-2025-01720 Aliases CVE-2025-1975GHSA-wrh5-cmwx-q2qr

Improper Validation of Array Index in ollama/ollama

Priority HIGH 72CWE-129Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-129 and the CVSS impact.

Summary

A vulnerability in the Ollama server version 0.5.11 allows a malicious user to cause a Denial of Service (DoS) attack by customizing the manifest content and spoofing a service. This is due to improper validation of array index access when downloading a model via the /api/pull endpoint, which can lead to a server crash.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00517 44th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ollamaollama/ollamaup to latest—No fix listedCNA
—github.com/ollama/ollama (Go)up to 0.5.11—No fix listedGHSA-wrh5-cmwx-q2qr
  • ollama/ollama Vendorollama Affected up to latest Fixed in — No fix listed CNA
  • github.com/ollama/ollama (Go) Vendor— Affected up to 0.5.11 Fixed in — No fix listed GHSA-wrh5-cmwx-q2qr

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ollama:ollama:0.5.11:*:*:*:*:*:*:*0.5.11Vulnerableollama
  • cpe:2.3:a:ollama:ollama:0.5.11:*:*:*:*:*:*:* Versions 0.5.11 Vulnerable ·ollama

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat Ansible Automation Platform 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-1975
  2. 2026-10-03 Alias added: GHSA-wrh5-cmwx-q2qr

References

Exploit 1

Advisory 1

Other 3

  • TI-2024-24572 Ollama before 0.1.34 does not validate the format of the digest (sha256 with 64 hex… CVSS 3.1HIGH 8.8
  • TI-2025-14153 Ollama Multi-Modal Model Image Processing NULL Pointer Dereference CVSS 4.0HIGH 8.7
  • TI-2024-26641 An issue was discovered in Ollama before 0.1.46. CVSS 3.1HIGH 8.2
  • TI-2025-41098 An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via… CVSS 3.1HIGH 7.5
  • TI-2025-41097 An issue in ollama v.0.12.10 allows a remote attacker to cause a denial of service via the GGUF decoder CVSS 3.1HIGH 7.5
  • TI-2025-00256 Divide By Zero in ollama/ollama CVSS 3.1HIGH 7.5
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences