CVE-2026-30691

MEDIUM

@cyntler/react-doc-viewer 1.17.1 - Cross-Site Scripting via TXTRenderer Component

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-30691. PoCs published by walidriouah.

AI-analyzed exploit summary This repository provides a detailed technical analysis of CVE-2026-30691, a Stored XSS vulnerability in @cyntler/react-doc-viewer v1.17.1. It includes a proof-of-concept payload, vulnerable code snippet, and recommended fixes.

Description

Cross-Site Scripting (XSS) vulnerability in @cyntler/react-doc-viewer v1.17.1 allows remote attackers to execute arbitrary JavaScript via a crafted .txt file. The TXTRenderer component fails to sanitize file content and explicitly casts raw data as a ReactNode

Exploits (1)

github WRITEUP
by walidriouah · poc
https://github.com/walidriouah/CVE-2026-30691

This repository provides a detailed technical analysis of CVE-2026-30691, a Stored XSS vulnerability in @cyntler/react-doc-viewer v1.17.1. It includes a proof-of-concept payload, vulnerable code snippet, and recommended fixes.

Classification
Writeup 95%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: @cyntler/react-doc-viewer v1.17.1
No auth needed
Prerequisites: A crafted .txt file with malicious JavaScript · Victim interaction to open the file in the vulnerable viewer
devstral-2 · analyzed May 20, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 6.1
EPSS 0.0001
EPSS Percentile 2.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
cyntler/react-doc-viewer 0 - 1.17.1npm
Published May 20, 2026
Tracked Since May 20, 2026