CVE-2025-10585 — Google Chromium V8 Type Confusion Vulnerability

Type confusion in V8 in Google Chrome prior to 140.0.7339.185 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

01What is this vulnerability?

Type confusion in V8 in Google Chrome prior to 140.0.7339.185 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

02Affected products

Vendor	Product	Versions
Google	Chrome	140.0.7339.185

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2025-09-23. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2025-09-24T16:17:11.576Z
• Last modified: 2026-02-26T17:48:08.089Z
• Added to CISA KEV: 2025-09-23
• BOD 22-01 due: 2025-10-14

09References

• chromereleases.googleblog.com — https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop_…
• issues.chromium.org — https://issues.chromium.org/issues/445380761