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CVE-2026-109563— N3.js before 2.11.1 ReDoS via N3Lexer Numeric-Literal Regex

Quick assessment

Affected
rdfjs N3.js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

N3.js 在 2.11.1 版本之前存在正则表达式拒绝服务漏洞，该漏洞位于 N3Lexer 的数字模式部分，在处理长串数字时会发生二次回溯（quadratic backtracking）。攻击者可以提供包含未结束数字长串的、不受信任的 Turtle 或 N3 格式输入，从而阻塞 Node.js 事件循环，导致拒绝服务。

CVSS 7.5 · High EPSS 0.35% · P27

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
rdfjs N3.js < 2.11.1 affected
2.11.1 unaffected
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I. Basic Information for CVE-2026-109563

Vulnerability Information
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Vulnerability Title
N3.js before 2.11.1 ReDoS via N3Lexer Numeric-Literal Regex
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rdfjs N3.js 0 ~ 2.11.1 -

II. Public POCs for CVE-2026-109563

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-109563

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Patches & Fixes for CVE-2026-109563 (2)

Vendor Advisories for CVE-2026-109563 (1)

IV. Related Vulnerabilities

Same weakness: CWE-1333

V. Comments for CVE-2026-109563

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