major vulnerability· requires attention

Enables creation of rogue child CAs and ROAs in RPKI, risking widespread routing hijacks across internet infrastructure.

Networks

CVE-2026-109141

8.4

High

EPSS 0.28%

Auth flaw in Krill RPKI lets attackers create child CAs and ROAs via bulk import.

exploited

No known exploitation not in CISA KEV as of our last sync

fix

No fixed release stated by the publisher

likelihood

EPSS 0.28%top 80% of scored CVEs

Published 2 Nov 2026Analysed here 3 Nov 2026CVSS scored by the publisher (CNA)

common questions

Is CVE-2026-109141 being exploited?

Not confirmed. CVE-2026-109141 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.28% probability of exploitation in the next 30 days.

How severe is CVE-2026-109141?

CVE-2026-109141 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-109141?

Not known from our data. No patch reference has been recorded for CVE-2026-109141, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.

What does CVE-2026-109141 affect?

CVE-2026-109141 affects Krill (RPKI CA server), RPKI deployments using Krill, Network routing infrastructure relying on RPKI. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-109141?

Disable bulk import, audit CA-role mappings, rotate CA keys, apply vendor patch when released.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

Krill (RPKI CA server)RPKI deployments using KrillNetwork routing infrastructure relying on RPKI

impact

Privilege escalation to CA-level: add child CAs, inherit resources, create ROAs enabling route hijack and certificate misuse.

action required

Immediate action required

cisa ssvc

exploitation: none
automatable: no
technical impact: total

Assessed by CISA 2 Nov 2026 (SSVC 2.0.3).

timeline

2 Nov 2026Published
2 Nov 2026CISA SSVC assessment: exploitation none · same day later
2 Nov 2026CVE record last updated · same day later
3 Nov 2026Analysed by vulneraibility.com · 1 day later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

1 reference in the CVE record: 1 advisory

Advisorynlnetlabs.nl /downloads/krill/CVE-2026-109141.txt

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
CISA Vulnrichment (ADP): SSVC decision points
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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