Chrome Web Store

Twitch Enhanced Viewer Extension Leaks OAuth Tokens From Nearly 31,000 Users

The browser extension Twitch Enhanced Viewer | JeetBot, available in the official Chrome Web Store and Mozilla Add-ons, secretly forwarded OAuth session tokens to proxies controlled by its operator. These bearer tokens allow full account takeover without passwords or second-factor authentication, enabling actions such as reading and sending whispers, posting in chat, and modifying account settings. The issue surfaced prominently in the v85.x branch where tokens were appended as the &auth= query parameter during network redirects to operator-controlled proxy servers, exposing them in clear text within proxy logs. Earlier v4.x versions had already transmitted tokens via POST requests to a set-token endpoint and backup servers on deno.dev and deno.net. A fix appeared in Firefox version 85.8.7 that stops token exfiltration by altering playlist retrieval, while a Chrome patch is in preparation. Users are advised to uninstall the extension immediately, revoke all active Twitch sessions, and review recent account activity for signs of unauthorized use.

Twitch Enhanced Viewer Extension Leaks OAuth Tokens from Nearly 31,000 Users

The browser extension Twitch Enhanced Viewer | JeetBot, available in the official Chrome Web Store and Mozilla Add-ons, secretly forwarded OAuth session tokens to proxies controlled by its operator. These bearer tokens allow full account takeover without passwords or second-factor authentication, enabling actions such as reading and sending whispers, posting in chat, and modifying account settings. The issue became especially severe in the v85.x branch, where tokens were appended as the &auth= query parameter during network redirects to the operator’s proxy servers, exposing them in clear text within proxy logs. Earlier versions had already transmitted tokens via POST requests to a set-token endpoint and maintained backup endpoints on deno.dev and deno.net. A fix is available in Firefox starting with version 85.8.7, which stops token exfiltration by changing the playlist retrieval method, while a corresponding Chrome patch is in preparation. Users are advised to uninstall the extension immediately, revoke all active Twitch sessions, and review recent account activity for signs of unauthorized use.

Browser Extension Anonymizes Sensitive Data Before Sending to AI Chatbots

A new browser extension automatically detects and replaces sensitive information such as names, INN numbers, bank cards, and emails with pseudonyms before any text or files reach AI chat services. The tool operates entirely locally in the browser, ensuring original data never leaves the user's device while allowing AI models to process anonymized placeholders. Responses from the AI are decrypted back to readable form only on the user's screen using an in-memory mapping that disappears when the browser closes. The solution supports over 70 file formats including DOCX, XLSX, and PDF, plus offline OCR for scanned documents to handle the most common leakage vectors used by HR, legal, and accounting teams. Multiple validation layers including checksums, Luhn algorithm, entropy checks, and normalization for Russian name declensions reduce false positives that plagued earlier regex-based attempts. The extension is available in a free version on the Chrome Web Store covering 33 data categories, with advanced file and scan features offered on request.

Vulnerability in Adobe Acrobat Chrome Extension Allowed Theft of WhatsApp Web Conversations

A flaw in the Adobe Acrobat extension for Chrome enabled malicious websites to steal active WhatsApp Web conversations, contacts, and profile information without requiring any user interaction beyond visiting a prepared URL. The vulnerability, tracked as CVE-2026-48294 and named HermeticReader, carried a CVSS score of 7.4 and affected approximately 329 million installations across all versions up to 26.5.2.2. Attackers exploited internal extension pages and missing origin validation to modify local storage, activate the Hermes integration mechanism, and extract rendered chat content by predicting tab identifiers and sending commands to the Acrobat component. The stolen data included contact names, conversation lists, message previews, profile details, and the full text of open chats, all transmitted to attacker servers via hidden forms while leaving end-to-end encryption intact. Adobe addressed the issue in version 26.5.2.3, which was automatically pushed through the Chrome Web Store. No evidence of in-the-wild exploitation had surfaced prior to public disclosure.