How severe is CVE-2016-1646?

CVE-2016-1646 has a CVSS 3.1 base score of 8.8 (HIGH). EPSS estimates a 48.1% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2016-1646: Google Chromium V8 Out-of-Bounds Read Vulnerability

CISA Known Exploited Vulnerabilities

Google Chromium V8 Out-of-Bounds Read Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2022-06-08

Remediation due

2022-06-22

Required action
Apply updates per vendor instructions.

CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2016-1646

Description

The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google Chrome before 49.0.2623.108, does not properly consider element data types, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via crafted JavaScript code.

Severity

CVSS 3.1 · CISA8.8 HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Exploitation Context

as of October 13, 2026

All KEV statistics→

CISA added CVE-2016-1646 to the KEV catalog 2,262 days after its CVE record was published.
It is one of 75 Google entries in the CISA KEV catalog, and one of 21 added in 2022.
Its current EPSS score (48.1%) is higher than that of 49% of CISA KEV entries.

Affected Products

Vendor	Product	Affected versions
-	-	n/a

References

11 Links

Vendor advisories

Vulnerability databases

1035423

Other references

Record Details

Published

2016-03-29

Last updated

2025-10-21

Assigner (CNA)

Chrome

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.