ModHeader Extension Pulled After Dormant Browser-History Collector Discovered

Tue, 14 Jul 2026 12:08:08 +0000

Engineer — Act: ModHeader is widely used by engineers for API and header debugging — remove it from all developer and CI browsers now and replace with a vetted alternative; dormant or not, undisclosed collection code in a tool with store-level trust is a supply-chain red flag.
SOC/IR — Plan: No active exploitation or IOCs to sweep for, but this is a prompt to audit the browser extension inventory across developer workstations and establish an approved-extension policy or detection for unapproved extension installs.
Leader — Learn: No data was collected and both stores have already pulled the extension, so no breach disclosure or vendor inquiry is warranted; useful data point on browser-extension supply-chain risk when building or updating software-inventory and vendor-vetting policies.

Dormant-Malware on CuraSec