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5.3

Chrome and Chromium can expose data to nearby attackers

CVE-2026-106243 · published 29 days ago
Summary

Older versions of Google Chrome and the Debian Chromium package may leave some authentication details uncleared, allowing a nearby attacker to capture sensitive information through specially crafted network traffic. This could let the attacker see passwords or session data. Upgrade Chrome and Chromium to the latest available version to close the gap.

What to do
  • Update google chrome to version 155.0.8059.39 or later.
Affected software
Ecosystem VendorProductAffected versions
– google chrome < 155.0.8059.39
Debian:12 debian chromium All versions
Original advisory text
DEBIAN-CVE-2026-106243
Incomplete cleanup in Proxy Auth in Google Chrome prior to 155.0.8059.39 allowed an adjacent attacker to obtain sensitive information via crafted network traffic. (Chromium security severity: High)
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
5.3 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-459Incomplete Cleanup
Timeline
Published6 Oct 2026
Updated8 Oct 2026
First seen6 Oct 2026
Sources
CVE-2026-106243 · NVD
CVE-2026-106243 · MITRE
DEBIAN-CVE-2026-106243 · OSV
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