CVE-2026-9955: Inappropriate implementation in iOS

Published Apr 19, 2026
·
Updated

Chromium: CVE-2026-9955 Inappropriate implementation in iOS

Other sources

Inappropriate implementation in iOS in Google Chrome on iOS prior to 148.0.7778.216 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

— 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

6 affected componentsFixes available
Google Google Chrome for iOS<148.0.7778.216
Google Chrome<148.0.7778.216
148.0.7778.216
All of the following
Google Chrome<148.0.7778.216
Apple iPhone OS
Microsoft Edge (Chromium-based)
Patch available
Microsoft Edge<148.0.3967.97

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 148.0.7778.216
  2. Upgrade

    Upgrade Chromium/Google Chrome for iOS to a version that resolves this vulnerability.

    Fixed in 148.0.7778.216

Event History

Apr 19, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
May 28, 2026
CVE Published
via MITRE·10:25 PM
Data Sourced
via MITRE·10:25 PM
DescriptionWeakness
Data Sourced
via NVD·11:16 PM
DescriptionSeverityWeaknessAffected Software
May 31, 2026
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
DescriptionAffected Software
Apr 28, 58520
Event
via FIRST·12:14 PM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-9955?

The severity of CVE-2026-9955 is medium with a CVSS score of 4.3.

2

How do I fix CVE-2026-9955?

To fix CVE-2026-9955, update Google Chrome and Microsoft Edge to version 148.0.7778.216 or later.

3

What type of vulnerability is CVE-2026-9955?

CVE-2026-9955 is classified as an inappropriate implementation vulnerability that causes an info leak.

4

Who is affected by CVE-2026-9955?

CVE-2026-9955 affects users of Google Chrome and Microsoft Edge running on iOS prior to the specified version.

5

Can CVE-2026-9955 allow data leakage?

Yes, CVE-2026-9955 allows a remote attacker to leak cross-origin data via a crafted HTML page.

Company

Resources

Contact

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