CVE-2026-11645: Google Chromium V8 Out-of-Bounds Read and Write Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 9 Jun 2026, 1 day after the CVE record was published.

How likely is exploitation in the next 30 days?

2.4%

EPSS score, percentile 84.2 of all scored records

How severe?

8.8 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 23 Jun 2026. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

• from 149.0.7827.103 to before 149.0.7827.103

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 23 June 2026.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

• https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_0153744567.html
• https://issues.chromium.org/issues/506689381
• https://nvd.nist.gov/vuln/detail/CVE-2026-11645

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Google Chromium V8 out-of-bounds read and write vulnerability that could allow a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2026-11645 to its Known Exploited Vulnerabilities (KEV) catalog on 9 Jun 2026.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 23 Jun 2026.
• The CVE record was published on 8 Jun 2026, 1 day before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 8.8 (High), taken from CISA's enrichment of the record.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 2.4% (percentile 84.2), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Out of bounds read and write in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-125: Out-of-bounds Read
• CWE-787: Out-of-bounds Write

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

References

• chromereleases.googleblog.com
• issues.chromium.org

More exploited Google vulnerabilities

• CVE-2026-111497: Google Brotli Unchecked Return Value Vulnerability (added 27 Oct 2026)
• CVE-2026-58704: Google Pixel Improper Authorization Vulnerability (added 16 Sep 2026)
• CVE-2026-87491: Google Chromium V8 Out of Bounds Write Vulnerability (added 9 Sep 2026)
• CVE-2026-85046: Google Chromium V8 Type Confusion Vulnerability (added 4 Sep 2026)
• CVE-2026-5281: Google Dawn Use-After-Free Vulnerability (added 1 Apr 2026)
• CVE-2026-3909: Google Skia Out-of-Bounds Write Vulnerability (added 13 Mar 2026)