CVE-2026-109142

Description

When a CA's parent lives on the same Krill server: instead of building and verifying a signed CMS message, it runs the RFC 6492 provisioning exchange in-process and trusts the child identity (child_handle) that the caller put in the parent contact. Nothing checks that this child identity actually belongs to the CA making the request.

Overview

State: PUBLISHED
Assigner (CNA): NLnet Labs
CVSS severity: HIGH
CVSS score: 8.4 / 10
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
Effective score: 8.4 / 10 HIGH source: CNA overview
CWE(s): CWE-639
Reserved: 2026-10-12
Published: 2026-11-02 15:42 UTC
Last updated: 2026-11-02 16:10 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/109xxx/CVE-2026-109142.json
Linked Threat: CVE-2026-109142 — Krill treats a "local parent" as already-authenticated, letting a CA operator act as any child of any CA on the same server

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-11-02 16:17:27 UTC
NVD last modified: 2026-11-02 19:35:33 UTC
NVD CVSS v3.1: 8.4 / 10 HIGH source: sep@nlnetlabs.nl
NVD CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
Exploitability subscore: 1.8 / 10
Impact subscore: 6.0 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-115257

EUVD enrichment is queued; refresh the page in a few seconds.

Affected products (1)

Vendor	Product	Versions	Platforms
NLnet Labs	Krill	`0.16.1` (unaffected)	—

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109142.txt vendor-advisory

MITRE references (1) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109142.txt vendor-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109142.txt sep@nlnetlabs.nl

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

October 2026 Critical Patch Update Released | security

web:blogs.oracle.com

For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

2026-11-03 08:23 UTC
October 2026 Patch Tuesday...here we go again! - Spiceworks Community

web:community.spiceworks.com

Another record-breaking patch cycle…1408 CVE's , .NET 8 and 9 reach EOS next month (start planning, if you're not already) Microsoft Publisher starts vanishing and place your bets now, on how much breaks between now and next month!

2026-11-03 08:23 UTC
Patch Notes Version 2.04.02 (All Platforms Hotfix)

web:crimsondesert.pearlabyss.com

Fellow Greymanes, Here are the fixes and improvements that have been added this patch . Update ScheduleThe patch is rolling out across all platforms. Please refer to the Update section below to see the state of the patch for each platform. UpdateSteam (PC): Patch available now Steam (Mac): Patch ...

2026-11-03 08:23 UTC
Pennsylvania Access To Criminal History - Home - pa

web:epatch.pa.gov

Why does PATCH exist? Its purpose is to better enable the public to obtain criminal history record checks. The repository was created and is maintained in accordance with Pennsylvania's Criminal History Information Act contained in Chapter 91 of Title 18, Crimes Code. This Act also directs the Pennsylvania State Police (PSP) to disseminate criminal history data to criminal justice agencies ...

2026-11-03 08:23 UTC
Security Update Guide - Microsoft Security Response Center

web:msrc.microsoft.com

Security Update Guide - Microsoft Security Response Center

2026-11-03 08:23 UTC
ArcGIS Server Security 2026 Update 3 Patch - Esri Support

web:support.esri.com

This patch deals specifically with the issues listed below under Issues addressed with this patch . As part of the patch installation, the ArcGIS Server service is stopped and restarted. The restart may take several minutes depending on the number of services published on the ArcGIS Server site. This patch can be uninstalled as outlined in the Uninstalling this patch on Windows and Uninstalling ...

2026-11-03 08:23 UTC
Patch Tuesday October 2026 - Action1

web:www.action1.com

In this issue: October 2026 Patch Tuesday updates from Microsoft, featuring zero-day vulnerabilities and critical security flaws.

2026-11-03 08:23 UTC
Patch now: PHP2Shell, Brotli, and eMudhra guidance for customers

web:www.microsoft.com

Resources you patch manually: nothing is installed automatically for you. Apply the updates now, starting with internet-facing systems, and then restart or reimage. Software you installed or bundled: you update it no matter how you patch . Rebuild and redeploy containers and custom images.

2026-11-03 08:23 UTC
Text Form of Oracle CPU October 2026 Risk Matrices

web:www.oracle.com

Text Form of Oracle Critical Patch Update - October 2026 Risk Matrices This document provides the text form of the October 2026 Advisory Risk Matrices. Please note that the CVE IDs in this document correspond to the same CVE IDs in the October 2026 Advisory. This page contains the following text format Risk Matrices: Oracle Database Server ...

2026-11-03 08:23 UTC
KB4951: Vulnerabilities Resolved in Veeam ONE 13.1 Patch 1

web:www.veeam.com

Vulnerabilities Resolved in Veeam ONE 13.1 Patch 1 Veeam® is committed to ensuring its products protect customers from potential risks. As part of that commitment, we operate a Vulnerability Disclosure Program (VDP) for all Veeam products and perform extensive internal code audits. When a vulnerability is identified, our team promptly develops a patch to address and mitigate the risk. In line ...

2026-11-03 08:23 UTC

AI Forensic Analysis

Only Available for Registered Users. Sign in to view.

Raw JSON

The full cvelistV5 record. Download as CVE-2026-109142.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-109142",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-02T16:10:47.154411Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-02T16:10:56.242Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "Krill",
          "vendor": "NLnet Labs",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0.16.1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Anthropic and Ada Logics"
        }
      ],
      "datePublic": "2026-11-02T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "When a CA's parent lives on the same Krill server: instead of building and verifying a signed CMS message, it runs the RFC 6492 provisioning exchange in-process and trusts the child identity (child_handle) that the caller put in the parent contact. Nothing checks that this child identity actually belongs to the CA making the request."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "CWE-639 Authorization Bypass Through User-Controlled Key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-02T15:42:13.364Z",
        "orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6",
        "shortName": "NLnet Labs"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.nlnetlabs.nl/downloads/krill/CVE-2026-109142.txt"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "This issue is fixed in 0.16.1 and all later versions."
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-10-03T00:00:00.000Z",
          "value": "Issue reported"
        },
        {
          "lang": "en",
          "time": "2026-11-02T00:00:00.000Z",
          "value": "Fixes released"
        }
      ],
      "title": "Krill treats a \"local parent\" as already-authenticated, letting a CA operator act as any child of any CA on the same server",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6",
    "assignerShortName": "NLnet Labs",
    "cveId": "CVE-2026-109142",
    "datePublished": "2026-11-02T15:42:13.364Z",
    "dateReserved": "2026-10-12T11:22:34.614Z",
    "dateUpdated": "2026-11-02T16:10:56.242Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}