← back to feed
ETK-2026-2219Zero's internal tracking ID, independent of the CVE number.

ETK-2026-2219Zero's internal tracking ID, independent of the CVE number.

waiting for further signalsZero needs more public information before it can validate it.

GHSA-jqc8-qjfv-5m6r ↗

no check availablenot proven exploitable
awaiting cvepublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).−12h05mkevAttacks confirmed in the real world.
pip:numcodecs >= 0.17.0, < 0.17.1; >= 0.16.0, < 0.16.6; >= 0.1.0, < 0.15.2
fixed in 0.17.1, 0.16.6, 0.15.2
CWE-502 Deserialization of Untrusted Data
ETK-2026-2219Zero's internal tracking ID, independent of the CVE number., no cve assigned
pkg:pypi/numcodecs
cvss8.8cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
10h 41msince last run
11mAI analysisAnalysis: how long the AI spent reversing this signal.
timeline
0 = cve.org, not yet published
trigger signal −12h05mpublic poc−12h05mwaiting for further signals−10h41m
−12h
−9h
−6h
−3h
0

description

Affected numcodecs releases can invoke attacker-controlled code while reading array data that selects the Pickle codec. An attacker must be able to supply or alter array metadata and chunk content that the application reads, such as through an untrusted dataset or remote array source.

mitigation

Upgrade numcodecs to 0.17.1, 0.16.6, or 0.15.2, selecting the applicable maintained release line. Until upgraded, do not read untrusted arrays or array data from untrusted remote sources.

fixed in 0.17.1, 0.16.6, 0.15.2

check
no
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.
contextual
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.
–
agent run time
11m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
not published yet
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
−12h05m
Δ to kevAttacks confirmed in the real world.
–

outcome

Contextual: an exploit technique exists, but no deterministic check could cover this one.

source signals

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

  1. 2026-10-20 19:01Z
  2. 2026-10-20 19:01Z

this entry in the feed

GET /api/v1/feed/ETK-2026-2219

{
  "etk_id": "ETK-2026-2219",
  "cve_id": null,
  "display_id": "ETK-2026-2219",
  "ghsa_id": "GHSA-jqc8-qjfv-5m6r",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "awaiting_cve",
  "title": "Arbitrary code execution in numcodecs Pickle decoding",
  "summary": "Affected numcodecs releases can invoke attacker-controlled code while reading array data that selects the Pickle codec. An attacker must be able to supply or alter array metadata and chunk content that the application reads, such as through an untrusted dataset or remote array source.",
  "mitigation": "Upgrade numcodecs to 0.17.1, 0.16.6, or 0.15.2, selecting the applicable maintained release line. Until upgraded, do not read untrusted arrays or array data from untrusted remote sources.",
  "vendor": "pip",
  "product": "pip:numcodecs",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.17.0, < 0.17.1"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "0.17.1"
      ],
      "package_name": "numcodecs",
      "purl": "pkg:pypi/numcodecs"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.16.0, < 0.16.6"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "0.16.6"
      ],
      "package_name": "numcodecs",
      "purl": "pkg:pypi/numcodecs"
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0.1.0, < 0.15.2"
      ],
      "ecosystem": "pip",
      "fixed_versions": [
        "0.15.2"
      ],
      "package_name": "numcodecs",
      "purl": "pkg:pypi/numcodecs"
    }
  ],
  "cwes": [
    502
  ],
  "cvss_score": 8.8,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 10.52185185,
  "t0_at": null,
  "signals": {
    "public_poc": {
      "at": "2026-10-20T19:01:32+00:00",
      "days": -0.5036013128472222,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T07:06:43.223764+00:00",
      "url": "https://github.com/zarr-developers/numcodecs/security/advisories/GHSA-jqc8-qjfv-5m6r"
    },
    "trigger_signal": {
      "at": "2026-10-20T19:01:32+00:00",
      "days": -0.5036013128472222,
      "is_lower_bound": true,
      "measured_at": "2026-10-21T07:06:43.223764+00:00",
      "url": "https://github.com/zarr-developers/numcodecs/security/advisories/GHSA-jqc8-qjfv-5m6r"
    }
  }
}

published 2026-10-20 20:39Z
last change 2026-10-21 07:05Z

Need the technical details behind an entry?

Every entry here shows what we attempted and when. The technical details, the generated exploit that fired it and the evidence behind the verdict are not public. Tell us about your use case and we’ll get back to you about extended API access.

Protected by reCAPTCHA; the Google Privacy Policy and Terms of Service apply.