CVE-2026-8517Network attack vector

Arbitrary code execution via WebShare lifecycle flaw

Published May 14, 2026 · Updated May 14, 2026

Object lifecycle error in WebShare in Google Chrome for Mac before 148.0.7778.168 allows remote attackers to execute code via a crafted page. The public record identifies WebShare lifecycle handling but does not disclose the affected object or the incorrect lifetime operation. Exploitation requires a user on macOS to open attacker-controlled HTML and perform specific UI gestures, after which code runs in the browser's context.

CVSS severity8.8
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Object lifecycle error in WebShare in Google Chrome for Mac before 148.0.7778.168 allows remote attackers to execute code via a crafted page. The public record identifies WebShare lifecycle handling but does not disclose the affected object or the incorrect lifetime operation. Exploitation requires a user on macOS to open attacker-controlled HTML and perform specific UI gestures, after which code runs in the browser's context.

The record

CVE
CVE-2026-8517
Published
May 14, 2026
Updated
May 14, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-664, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 14, 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=148.0.7778.168 <148.0.7778.168

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=148.0.7778.168 <148.0.7778.168

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-664Improper Control of a Resource Through its Lifetime
T1203Exploitation for Client Execution

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

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Your stack

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