---
title: "The vulnerability affects some systems that use Brotli and brotlicffi libraries in Node.js, Bun,… — Turan Security Xavfsizlik Byulleteni — DecisionGateway"
description: "statement by Turan Security Xavfsizlik Byulleteni, recorded recently — verbatim quote and source citation."
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> Index of every page on this site: [llms.txt](https://dgw.tmarket.io/llms.txt)

statement

# **The vulnerability affects some systems that use Brotli and brotlicffi libraries in Node.js, Bun, Envoy, Istio and Python.**

A statement by Turan Security Xavfsizlik Byulleteni. Statements are as reported by the cited publishers — not verified by DecisionGateway.

> *Zaiflik Node.js, Bun, Envoy, Istio va Python’ning Brotli hamda brotlicffi kutubxonalaridan foydalanadigan ayrim tizimlarga ta’sir qiladi.*

turansecurityPublished 2026-10-25 [ Read source](https://t.me/turansecurity/679)

## **Discussion**

## **Related claims**

[**Organizations should inventory Brotli versions in Node.js, Bun, Envoy, Istio and Python environments, since updating the runtime is not always sufficient and separate Brotli libraries inside the application should also be checked.**Turan Security Xavfsizlik Byulleteni · commitment](https://dgw.tmarket.io/claims/01a1d0d9-f223-757f-a905-12e3563920ac) [**A CVE-2026-111497 vulnerability was identified in Google's Brotli data compression library.**Turan Security Xavfsizlik Byulleteni · investigation](https://dgw.tmarket.io/claims/01a1d0d9-efd7-7fac-964b-17ccd3994fcb) [**Experts practically demonstrated code execution in a specific vulnerable version of Node.js by exploiting the vulnerability.**Mutaxassislar · investigation](https://dgw.tmarket.io/claims/01a1d0d9-f0f7-7b45-8ead-3f15edcb61d3) [**Turan Security calls on organizations to inventory Brotli-dependent components, strengthen monitoring, and not delay security updates.**Turan Security · commitment](https://dgw.tmarket.io/claims/01a1d0d9-f26c-7d6d-8000-a92835acd167) [**An application may not call Brotli directly; reading a 'Content-Encoding: br' response or decompressing a Brotli-compressed request body is enough.**Turan Security Xavfsizlik Byulleteni · statement](https://dgw.tmarket.io/claims/01a1d0d9-f182-7b15-adce-4cb337d853f7) [**The vulnerability can cause memory corruption, service disruption, and in some cases remote execution of malicious code via specially crafted compressed data.**Turan Security Xavfsizlik Byulleteni · statement](https://dgw.tmarket.io/claims/01a1d0d9-f01c-7fd0-8e8d-a76f51a82df0)

[All claims](https://dgw.tmarket.io/claims)

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