CVE-2026-95347Public exploit

Updater memory corruption via premature stream-reader destruction

Published Sep 29, 2026 · Updated Sep 29, 2026

Use-after-free in Google Chrome's macOS Updater before 154.0.8037.57 allows remote attackers to corrupt updater memory via update traffic. On a destination write failure, DownloadStreamReader destroys its active DataPipeDrainer inside a callback, after which the drainer reads a freed member. A full destination volume produced an updater crash in the published reproduction; Chromium stated that a practical code-execution path was not clear.

CVSS severityUnavailable
Unscored
EPSS probability0.43%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Google Chrome's macOS Updater before 154.0.8037.57 allows remote attackers to corrupt updater memory via update traffic. On a destination write failure, DownloadStreamReader destroys its active DataPipeDrainer inside a callback, after which the drainer reads a freed member. A full destination volume produced an updater crash in the published reproduction; Chromium stated that a practical code-execution path was not clear.

The record

CVE
CVE-2026-95347
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
WebM Project
Product
Google Chrome
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=154.0.8037.57 <154.0.8037.57

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

WebM Project · Google Chromeversion=154.0.8037.57 <154.0.8037.57

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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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