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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

CVSS score

8.4

EPSS probability

—

Risk score

0.8

Published

4 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-109142: Krill Local Parent Authentication Vulnerability

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

A high-severity vulnerability in NLnet Labs Krill occurs when local parents on the same server are treated as already authenticated.

Why does it matter?

This vulnerability allows a CA operator to act as any child of any CA on the same server, compromising security boundaries.

What should be done?

  • Following vendor advisories as patch status is unknown
  • Checking official updates from NLnet Labs
  • Reviewing local CA configurations
Chain of evidence and sources3 verified claims

Krill, aynı sunucudaki yerel üst öğeleri kimliği doğrulanmış kabul eder ve çağrılan child_handle değerini denetlemez.

S0 · daybreach-canonicalS1 · cvelist

Bu güvenlik açığı CVSS 8.4 temel puanı ile HIGH seviyesindedir.

S0 · daybreach-canonical

Yama durumu resmî kaynaklarda UNKNOWN olarak değerlendirilmiştir.

S0 · daybreach-canonical
Show the technical text from the sources

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.

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L

CWE: CWE-639

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-109142 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1NLnet LabsKrill View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
8.4CVSS V31HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:LNVD
8.4CVSS V3_1HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:LCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-109142 is associated with the following CWEs:

CWE-639: Common Weakness Enumeration Entry CWE-639

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-109142 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekmiyor

Official Sources and Advisories

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

CVSS Vector Radar Chart

8.4 / 10
Attack VectorNetworkComplexityHighPrivilegesLowUser Interact.NoneConfidentialityHighIntegrityNoneAvailabilityLow

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredLow privileges
User InteractionNone required
Confidentiality (Gizlilik)High
Integrity (Bütünlük)None
Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

NL
NLnet Labs logo
NLnet Labs

Weakness Type (CWE & CAPEC)

CWE-639

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CVE-2026-109142 · Krill treats a "local parent" as…