Vulnerability · Published Jul 30, 2026 · Assigned by Chrome
CVE-2026-17903
Medium 5.4
In plain English
A medium-severity cross-site scripting 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 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.2%top 94.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Insufficient policy enforcement in Chromecast in Google Chrome prior to 151.0.7922.72 allowed an attacker on the local network segment to inject scripts or HTML into a privileged page via malicious network traffic. (Chromium security severity: Low)
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | chromium | 151.0.7922.71-1~deb12u1 | DEBIAN-CVE-2026-17903 |
| Debian:13 | chromium | 151.0.7922.71-1~deb13u1 | DEBIAN-CVE-2026-17903 |
| Debian:14 | chromium | 151.0.7922.71-1 | DEBIAN-CVE-2026-17903 |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N