Google Chromium V8 Type Confusion Vulnerability
Google · Chromium V8
Google Chromium's V8 JavaScript engine contains a type confusion flaw, where code can access a resource as an incompatible type, in the Chrome browser builds prior to 140.0.7339.185. A remote attacker who gets the user to load a crafted HTML page can potentially use it to corrupt heap memory, and no authentication or additional configuration is indicated.
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)
- Exploited
- Yes, in CISA KEV
- Reports
- 0
- Tactics
- 0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
First seen exploited 7 days before it was disclosed. Public exploit code (PoC-in-GitHub) was available 5 days before disclosure.
- First seen exploitedVulnCheck KEV evidence7 days before
- Public exploit codePoC-in-GitHub5 days before
- Added to CISA KEVEU database agrees1 day before
- Disclosedday 0
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linkedNo high- or medium-confidence techniques. The 2 available links are lower confidence and listed below.
Lower-confidence links (2)
These come from early or generic mappings, text matching, or contradict this CVE’s details (for example a public-facing technique on a bug that needs a user to open a file). Shown for completeness.
- Drive-by CompromiseT1189 server-side bug exploitable without user interaction; client-execution technique does not fit
- Exploitation for Client ExecutionT1203 server-side bug exploitable without user interaction; client-execution technique does not fit
What security researchers reported
Not named in any threat report yetAlso mentioned in 50 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Actively_Exploited_Kev | Oct 30, 202629 Oct 2026
- Actively_Exploited_Kev | Oct 29, 202628 Oct 2026
- Actively_Exploited_Kev | Oct 28, 202627 Oct 2026
- Actively_Exploited_Kev | Oct 27, 202626 Oct 2026
- Actively_Exploited_Kev | Oct 24, 202623 Oct 2026
- Actively_Exploited_Kev | Oct 23, 202622 Oct 2026
- 44 more on OTX