Description
Insufficient validation of untrusted input in ReadingMode in Google Chrome on Mac prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to bypass site Isolation via a crafted HTML page. (Chromium security severity: High)
Published: 2026-05-14
Score: 3.1 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

Insufficient validation of untrusted input while Chromium reads HTML content in ReadingMode on macOS allows a remote attacker who has already compromised the renderer process to serve a malicious page that bypasses the browser’s site isolation controls. This weakness is classified as CWE‑20 (Improper Input Validation) and CWE‑1289 (Improper Handling of Non‑Private Variables).

Affected Systems

Chrome on macOS versions earlier than 148.0.7778.168 are affected.

Risk and Exploitability

The CVSS score is 3.1, indicating low severity, and the EPSS score is below 1 %, reflecting a very low likelihood of exploitation. The vulnerability is not listed in CISA’s KEV catalog. Exploitation requires an attacker to first gain control of the renderer process; after that, the flaw permits bypassing site isolation, but the CVE description does not describe additional privileges or data access beyond that.

Generated by OpenCVE AI on May 15, 2026 at 16:24 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update Chrome to version 148.0.7778.168 or later from the stable channel
  • Verify that Chrome’s site isolation feature is enabled in the settings or via policy
  • Monitor for indicators that the renderer process has been compromised on the system

Generated by OpenCVE AI on May 15, 2026 at 16:24 UTC.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
Debian DSA Debian DSA DSA-6273-1 chromium security update
History

Fri, 15 May 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N'}

Fri, 15 May 2026 12:15:00 +0000

Type Values Removed Values Added
Title Insufficient Input Validation in Chrome ReadingMode Enables Site Isolation Bypass chromium-browser: chromium-browser: Insufficient validation of untrusted input in ReadingMode
Weaknesses CWE-1289
References
Metrics threat_severity

None

 cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N'}

threat_severity

Important

Thu, 14 May 2026 23:30:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google chrome
Vendors & Products Google
Google chrome

Thu, 14 May 2026 22:30:00 +0000

Type Values Removed Values Added
Title Insufficient Input Validation in Chrome ReadingMode Enables Site Isolation Bypass

Thu, 14 May 2026 20:15:00 +0000

Type Values Removed Values Added
Description Insufficient validation of untrusted input in ReadingMode in Google Chrome on Mac prior to 148.0.7778.168 allowed a remote attacker who had compromised the renderer process to bypass site Isolation via a crafted HTML page. (Chromium security severity: High)
Weaknesses CWE-20
References

Subscriptions

Google Chrome
cve-icon MITRE

Status: PUBLISHED

Assigner: Chrome

Published:

Updated: 2026-05-15T13:55:54.170Z

Reserved: 2026-05-14T05:40:16.763Z

Link: CVE-2026-8536

cve-icon Vulnrichment

Updated: 2026-05-15T13:55:48.331Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-05-14T20:17:14.457

Modified: 2026-05-15T15:16:54.667

Link: CVE-2026-8536

cve-icon Redhat

Severity : Important

Publid Date: 2026-05-14T19:52:21Z

Links: CVE-2026-8536 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-15T16:30:03Z

Weaknesses