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CVE-2026-11645 Google CVE debrief

CVE-2026-11645 is a HIGH severity vulnerability in Google Chromium V8, a JavaScript engine developed by Google. This vulnerability allows for out-of-bounds read and write, with a CVSS score of 8.8. It was published on 2026-06-09 and added to the CISA Known Exploited Vulnerabilities catalog on the same day, with a due date for mitigation by 2026-06-23.

Vendor
Google
Product
Chromium V8
CVSS
HIGH 8.8
CISA KEV
Listed
Original CVE published
2026-06-09
Original CVE updated
2026-06-09
Advisory published
2026-06-09
Advisory updated
2026-06-09

Who should care

Users and administrators of Google Chromium V8 are advised to apply mitigations per vendor instructions. Follow applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are unavailable.

Technical summary

Google Chromium V8 Out-of-Bounds Read and Write Vulnerability. The vulnerability has been identified in the Google Chromium V8 engine, which could allow an attacker to perform out-of-bounds read and write operations.

Defensive priority

HIGH

Recommended defensive actions

  • Apply mitigations per vendor instructions.
  • Follow applicable BOD 22-01 guidance for cloud services.
  • Discontinue use of the product if mitigations are unavailable.

Evidence notes

The CISA Known Exploited Vulnerabilities catalog (resourceLinkAnnotations: cisa-kev) and CVE record (resourceLinkAnnotations: cve-org) provide further details on this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11645 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11645

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-11645 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11645

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.