CVE-2026-78943: Improper input validation in Editing

Published May 14, 2026
·
Updated

Chromium: CVE-2026-78943 Improper input validation in Editing

Other sources

Improper input validation in Editing in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)

— MITRE

This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.

— Microsoft

Credit

Google

Affected Software

5 affected componentsFixes available
Google Chrome<152.0.7977.65
Google Chrome<152.0.7977.64
152.0.7977.64
Microsoft Edge<152.0.4191.53
Google Chrome<152.0.7977.65
Microsoft Edge (Chromium-based)<152.0.4191.53
152.0.4191.53

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 152.0.7977.64
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 152.0.4191.53
  3. Upgrade

    Upgrade Google Chrome/Chromium (Editing) to a version that resolves this vulnerability.

    Fixed in 152.0.7977.65

Event History

May 14, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Aug 25, 2026
CVE Published
via MITRE·08:10 PM
Data Sourced
via MITRE·08:10 PM
DescriptionWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeaknessAffected Software
Aug 28, 2026
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What does an attacker need to exploit this issue?

The attacker must already have compromised the Chrome renderer process and must use social engineering to get the target to interact with a crafted HTML page. The issue can then be used to bypass web origin policy.

2

Which Chrome versions are affected?

Google Chrome versions prior to 152.0.7977.65 are affected. Updating to 152.0.7977.65 or a later version addresses the affected version range.

3

Are users exposed simply by visiting a malicious page?

The available information says exploitation also requires a compromised renderer process and social engineering. It does not describe a standalone attack where merely loading a crafted page is sufficient.

Company

Resources

Contact

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