CVE-2026-109140

High

Description

The vulnerability is that Krill encrypts every login-session token with a nonce built from a counter that is reset to 0 on every Krill restart, so the same (key, nonce) pair is used again after each restart.

SeverityHigh

CVSS8.4

Exploit probability—

ProductKrill

PublishedNov 2, 2026

First seenNov 4, 2026

Weakness typeCWE-323CWE-323

How to fix

Vendor advisories

nlnetlabs.nl/downloads/krill/CVE-2026-109140.txt

Affected products

Product	Affected versions	Fixed in
NLnet Labs Krill	No range specified	—

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.