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CVE-2026-103663

CVE-2026-103663

validatedZero produced an exploit or a check.

GHSA-w8p2-phwr-px3r ↗EUVD-2026-94962 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).+11dkevAttacks confirmed in the real world.
Ollama >= 0.34.2, < 0.35.0
fixed in 0.35.0
ETK-2026-992, permanent identifier
cvss9.4cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
+4h17mTTV
27mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = trigger signal
trigger signal (cve.org) +0dcheck available+0.2dagent stoppedpublic poc+11d
0
+5d
+10d

description

Ollama's unauthenticated /api/pull endpoint can be abused to write files outside the model store. An attacker may achieve code execution after a server restart when the Ollama process can write to /usr/lib/ollama, as is commonly configured in Docker images.

mitigation

Upgrade Ollama to version 0.35.0 or later. Until upgraded, restrict unauthenticated access to the API and remove unnecessary write access to /usr/lib/ollama.

fixed in 0.35.0

check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
deterministic
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.71%53rd percentile
agent run time
27m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-08 13:19Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
+11d
Δ to kevAttacks confirmed in the real world.
–

outcome

Check only, differential: the check fires on the vulnerable build and is silent on the patched one.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

  1. 2026-10-08 13:19Z
    ghsa: trigger signal, started the run
    https://github.com/advisories/GHSA-w8p2-phwr-px3r
  2. 2026-10-08 13:19Z
  3. 2026-10-19 23:40Z

this entry in the feed

GET /api/v1/feed/CVE-2026-103663

{
  "etk_id": "ETK-2026-992",
  "cve_id": "CVE-2026-103663",
  "display_id": "CVE-2026-103663",
  "ghsa_id": "GHSA-w8p2-phwr-px3r",
  "euvd_id": "EUVD-2026-94962",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Path traversal in Ollama API pull endpoint",
  "summary": "Ollama's unauthenticated `/api/pull` endpoint can be abused to write files outside the model store. An attacker may achieve code execution after a server restart when the Ollama process can write to `/usr/lib/ollama`, as is commonly configured in Docker images.",
  "mitigation": "Upgrade Ollama to version 0.35.0 or later. Until upgraded, restrict unauthenticated access to the API and remove unnecessary write access to `/usr/lib/ollama`.",
  "vendor": "ollama",
  "product": "Ollama",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.34.2, < 0.35.0"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "0.35.0"
      ],
      "package_name": "Ollama",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 9.4,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
  "epss_score": 0.0071,
  "epss_percentile": 0.5311,
  "epss_asof": "2026-10-21",
  "automation": "deterministic",
  "check": true,
  "check_confidence_basis": "differential",
  "exploit": false,
  "pipeline_minutes": 26.959131116666665,
  "t0_at": "2026-10-08T13:19:04.819000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-08T17:36:21.650018+00:00",
      "days": 0.1786670256712963,
      "is_lower_bound": false,
      "measured_at": "2026-10-08T13:19:04.819000+00:00",
      "url": null
    },
    "public_poc": {
      "at": "2026-10-19T20:59:59+00:00",
      "days": 11.320071539351853,
      "is_lower_bound": false,
      "measured_at": "2026-10-08T13:19:04.819000+00:00",
      "url": "https://github.com/striga-ai/CVE-2026-103663"
    },
    "trigger_signal": {
      "at": "2026-10-08T13:19:04.819000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-08T13:19:04.819000+00:00",
      "url": "https://github.com/advisories/GHSA-w8p2-phwr-px3r"
    }
  }
}

published 2026-10-08 17:09Z
last change 2026-10-21 21:36Z

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