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CVE-2025-8578VulnerabilityPublished Updated

CVE-2025-8578: Google Chrome · Use after free

Affects Google ChromeSource CVE Database V5

0

Not known to be exploited · CVSS 8.8 High · fixed in 139.0.7258.66 : patch Google Chrome soon.

Data as of 26 Oct 2026, 07:57 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 26% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 139.0.7258.66
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 Aug 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Affected software

ProductAffectedFixed in
Google ChromeAffected
  • =139.0.7258.66
Fixed in–

AI-suggested

To mitigate CVE-2025-8578, organizations should immediately update all Chrome installations to version 139.0.7258.66 or later, where the vulnerability is patched. Employ enterprise patch management solutions to enforce timely updates across all endpoints. Enhance email and web filtering to block malicious URLs and attachments that could deliver crafted HTML pages exploiting this flaw. Conduct user awareness training emphasizing the risks of clicking unknown links or visiting untrusted websites. Implement endpoint detection and response (EDR) tools to monitor for anomalous browser behavior indicative of exploitation attempts. Consider deploying browser isolation technologies to contain potential attacks. Regularly audit browser extensions and plugins to reduce attack surface. Finally, maintain up-to-date backups and incident response plans to recover quickly if exploitation occurs.

Description

Use after free in Cast in Google Chrome prior to 139.0.7258.66 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)

References

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