CVE-2026-9887

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-28 · updated 2026-07-21
Weakness: CWE-416

Description

Use after free in Proxy in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code via a crafted PAC script. (Chromium security severity: Critical)

Affected products

Google Chrome: before 148.0.7778.216; before 148.0.7778.215 — fixed in 148.0.7778.215, 148.0.7778.216

How to fix

Upgrade to a fixed version: Google Chrome 148.0.7778.215, 148.0.7778.216. Check the vendor advisory for mitigations.

References

https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
https://issues.chromium.org/issues/511249104

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