Vulnerability · Published Oct 6, 2026 · Assigned by Chrome
CVE-2026-106243
Medium 5.3
In plain English
A medium-severity security flaw in Chrome from Google. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.1%top 98.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 155.0.8059.39-1~deb12u1 | DEBIAN-CVE-2026-106243 |
| Debian:13 | chromium | 155.0.8059.39-1~deb13u1 | DEBIAN-CVE-2026-106243 |
| Debian:14 | chromium | 155.0.8059.39-1 | DEBIAN-CVE-2026-106243 |
Affected products (as reported)
Weakness: CWE-459 · Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N