PT-2026-42214 · Npm · @Cyntler/React-Doc-Viewer

Walidriouah · Published 2026-05-20 · Updated 2026-05-21 · CVE-2026-30691

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions @cyntler/react-doc-viewer version 1.17.1

Description A Cross-Site Scripting (XSS) issue exists where remote attackers can execute arbitrary JavaScript by using a crafted .txt file. This occurs because the TXTRenderer component does not sanitize file content and explicitly casts raw data as a ReactNode (a type representing any renderable content in React).

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-30691

Affected Products

@Cyntler/React-Doc-Viewer

References · 5

• 🔥 https://github.com/walidriouah/CVE-2026-30691 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-30691 · Security Note
• https://github.com/cyntler/react-doc-viewer/issues/317 · Note
• https://t.me/cveNotify/164406 · Telegram Post
• https://t.me/CVEtracker/54409 · Telegram Post