CVE-2026-109563

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductN3.js

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-1333CWE-1333

How to fix

Update

rdfjs N3.js2.11.1 or later

Patches

github.com/rdfjs/N3.js/pull/760
github.com/rdfjs/N3.js/commit/b1c497fddb02c4772d61916bd2634115f45f424d

Affected products

Product	Affected versions	Fixed in
rdfjs N3.js	v < 2.11.1	2.11.1

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