Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-86289
n/a Ollama — Ollama GGUF Decoder gguf.go readGGUFV1String integer overflow
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N N P N N L 2.1 .0069 51.1 —
AFFECTED
Product Versions Fixed
Ollama 0.31.0 – 0.31.2-rc1
TIMELINE
Sep 6 Reserved by VulDB
Sep 7 Published (CNA: VulDB)
Sep 11 EXPLOIT PUBLISHED — CVE-2026-86289 (Ollama). Public exploit reference added.
Description
A vulnerability was found in Ollama up to 0.31.1. This issue affects the function readGGUFV1String of the file fs/ggml/gguf.go of the component GGUF Decoder. Performing a manipulation results in integer overflow. The attack is possible to be carried out remotely. The exploit has been made public and could be used. Upgrading to version 0.31.2-rc1 is capable of addressing this issue. The patch is named 67b6a1c2d45321e0cb3c04a18073f9818de7724b. It is recommended to upgrade the affected component.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| September 6, 2026 | Reserved | Reserved by VulDB |
| September 7, 2026 | Published | Published (CNA: VulDB) |
| September 11, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-86289 (Ollama). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| n/a | Ollama | — | 0.31.0 | 0.31.2-rc1 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-86289 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.