CVE-2026-104849

waiting for further signals

GHSA-85c8-ppgw-ccpr ↗EUVD-2026-91719 ↗

no check availablenot proven exploitable

cve.orgpublic poc−33dkev

tinylibs tinypool <=2.1.0

fixed in 2.1.2

CWE-94 Improper Control of Generation of Code ('Code Injection')

ETK-2026-354, permanent identifier

pkg:npm/tinypool

cvss9.5cna vendorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

18d 23h 39msince last run

18mAI analysis

timeline

0 = cve.org publication

public poc−33dtrigger signal (cve.org) +0dwaiting for further signals+0.0d

−30d

−20d

−10d

description

Tinypool before 2.1.2 can inherit a worker filename from a polluted prototype when an application passes an options object to pool.run. An attacker able to pollute Object.prototype may cause attacker-selected JavaScript to run in the worker pool and access or alter task data with host-process privileges.

mitigation

Upgrade tinypool to version 2.1.2 or later. Until upgraded, avoid passing caller-controlled options objects to pool.run and prevent prototype-pollution flaws in the application.

fixed in 2.1.2

check

exploit

automation

–

auth required

EPSS

0.39%31st percentile

agent run time

18m

cve.org record, t = 0

2026-10-02 16:17Z

Δ to public poc

−33d

Δ to kev

–

outcome

No artifact: an exploit or check was attempted but could not be produced at this moment.

source signals

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

2026-08-30 05:32Z
public poc
https://github.com/tinylibs/tinypool/security/advisories/GHSA-85c8-ppgw-ccpr
2026-10-02 16:17Z
cve_org: trigger signal, started the run
https://www.cve.org/CVERecord?id=CVE-2026-104849

this entry in the feed

GET /api/v1/feed/CVE-2026-104849

{
  "etk_id": "ETK-2026-354",
  "cve_id": "CVE-2026-104849",
  "display_id": "CVE-2026-104849",
  "ghsa_id": "GHSA-85c8-ppgw-ccpr",
  "euvd_id": "EUVD-2026-91719",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Prototype-pollution worker module injection in tinypool",
  "summary": "Tinypool before 2.1.2 can inherit a worker filename from a polluted prototype when an application passes an options object to pool.run. An attacker able to pollute Object.prototype may cause attacker-selected JavaScript to run in the worker pool and access or alter task data with host-process privileges.",
  "mitigation": "Upgrade tinypool to version 2.1.2 or later. Until upgraded, avoid passing caller-controlled options objects to pool.run and prevent prototype-pollution flaws in the application.",
  "vendor": "tinylibs",
  "product": "tinypool",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<=2.1.0"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "2.1.2"
      ],
      "package_name": "tinypool",
      "purl": "pkg:npm/tinypool"
    }
  ],
  "cwes": [
    94
  ],
  "cvss_score": 9.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
  "epss_score": 0.0039,
  "epss_percentile": 0.3162,
  "epss_asof": "2026-10-20",
  "automation": "deterministic",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 17.963903516666665,
  "t0_at": "2026-10-02T16:17:28.062000+00:00",
  "signals": {
    "public_poc": {
      "at": "2026-08-30T05:32:37+00:00",
      "days": -33.44781321759259,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T16:17:28.062000+00:00",
      "url": "https://github.com/tinylibs/tinypool/security/advisories/GHSA-85c8-ppgw-ccpr"
    },
    "trigger_signal": {
      "at": "2026-10-02T16:17:28.062000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-02T16:17:28.062000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-104849"
    }
  }
}

published 2026-10-02 16:37Z
last change 2026-10-21 15:37Z

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