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CVE-2026-109563

7.5 · HIGH

N3.js before 2.11.1 contains a regular expression denial of service vulnerability in the N3Lexer number pattern that backtracks quadratically on long digit runs.

Published Oct 12, 2026CWE-1333EPSS 0.35%

Overview

CVE-2026-109563 is a high-severity vulnerability. It was published on October 12, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

N3.js before 2.11.1 contains a regular expression denial of service vulnerability in the N3Lexer number pattern that backtracks quadratically on long digit runs. Attackers can supply untrusted Turtle or N3 input containing long runs of digits that do not end a number, blocking the Node.js event loop and causing denial of service.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/rdfjs/N3.jsGitHubgithub.com/rdfjs/N3.js/commit/b1c497fddb02c4772d61916bd2634115f45f424dGitHubgithub.com/rdfjs/N3.js/pull/760Refwww.vulncheck.com/advisories/n3-js-before-2.11.1-redos-via-n3lexer-numeric-literal-regex

How CyberStrike helps

Frequently asked questions

What is CVE-2026-109563?

CVE-2026-109563 is a high-severity vulnerability. It was published on October 12, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-109563?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-109563?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-109563?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-109563 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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