CVE-2026-7970Network attack vector

Sandbox escape via TopChrome use-after-free

Published May 6, 2026 · Updated May 6, 2026

Use after free in Google Chrome TopChrome before 148.0.7778.96 allows remote attackers with a compromised renderer to escape the sandbox. The component reuses an object after its lifetime ends, but Google has not disclosed the freed object or dereference path. Exploitation requires renderer compromise, user interaction with a crafted HTML page, and successful reuse of freed memory; the bounded result is escape from Chrome's renderer sandbox.

CVSS severity8.3
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Use after free in Google Chrome TopChrome before 148.0.7778.96 allows remote attackers with a compromised renderer to escape the sandbox. The component reuses an object after its lifetime ends, but Google has not disclosed the freed object or dereference path. Exploitation requires renderer compromise, user interaction with a crafted HTML page, and successful reuse of freed memory; the bounded result is escape from Chrome's renderer sandbox.

The record

CVE
CVE-2026-7970
Published
May 6, 2026
Updated
May 6, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=148.0.7778.96 <148.0.7778.96

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=148.0.7778.96 <148.0.7778.96

Published CVSS scores

8.3CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo