CYBERSECURITYTRACKER
TRACKING6,506 stories in this site build1,309 vulnerability news stories in this site build
Permanent story citation

Unpatched Claude for Chrome Flaw Lets Extensions Read Gmail, Calendar

This page keeps the story as Cybersecurity Tracker first published it. If the tracker later corrects it, the correction appears below the original and never replaces it.

Back to newsStory 2480

As cited

Copy frozen at (site build).

vulnerabilities

Unpatched Claude for Chrome Flaw Lets Extensions Read Gmail, Calendar

A vulnerability in Claude for Chrome remains unpatched across eight updates, allowing malicious extensions to access sensitive user data including Gmail and Calendar contents. The flaw appears related to ClaudeBleed, a class of vulnerabilities affecting how the extension isolates data from other browser extensions.

Why it matters: Users of Claude for Chrome face exposure of email and calendar data to any malicious extension installed in their browser; organizations should evaluate whether to restrict or disable the extension until a proper fix is released.

Source published
First seen by Cybersecurity Tracker

Source attribution

Correction

Correction recorded as of .

vulnerabilities

Unpatched Claude for Chrome Flaw Lets Extensions Read Gmail, Calendar

A vulnerability in Claude for Chrome remains unpatched across eight updates, allowing malicious extensions to access sensitive user data including Gmail and Calendar contents. The flaw appears related to ClaudeBleed, a class of vulnerabilities affecting how the extension isolates data from other browser extensions.

Why it matters: Users of Claude for Chrome face exposure of email and calendar data to any malicious extension installed in their browser; organizations should evaluate whether to restrict or disable the extension until a proper fix is released.

VendorsGoogle
Source published
First seen by Cybersecurity Tracker

Source attribution

Glossary