CVE-2026-9887
Google Chrome Use-After-Free in Proxy via Crafted PAC Script
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)
INFO
Published Date :
May 28, 2026, 11:16 p.m.
Last Modified :
May 29, 2026, 6:40 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-9887
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Google Chrome to the latest version.
- Apply security patch 148.0.7778.216.
- Avoid using untrusted PAC scripts.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-9887.
| URL | Resource |
|---|---|
| https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html | Vendor Advisory |
| https://issues.chromium.org/issues/511249104 | Permissions Required |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-9887 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-9887
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-9887 vulnerability anywhere in the article.
-
CybersecurityNews
Google Patches 151 Vulnerabilities in Chrome, Including 22 Critical Ones
Google has pushed a major Chrome Stable update that fixes 151 security flaws, including 22 critical vulnerabilities affecting core graphics, networking, media, and UI components across Windows, macOS, ... Read more
The following table lists the changes that have been made to the
CVE-2026-9887 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 29, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CPE Configuration AND OR *cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* versions up to (excluding) 148.0.7778.216 OR cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* versions up to (excluding) 148.0.7778.215 OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Added Reference Type Chrome: https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html Types: Vendor Advisory Added Reference Type Chrome: https://issues.chromium.org/issues/511249104 Types: Permissions Required -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 29, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H -
New CVE Received by [email protected]
May. 28, 2026
Action Type Old Value New Value Added 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) Added CWE CWE-416 Added Reference https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html Added Reference https://issues.chromium.org/issues/511249104