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PatchSiren cyber security CVE debrief

CVE-2026-91719 Google CVE debrief

A code injection vulnerability in XML in Google Chrome prior to 153.0.8010.47 allows remote attackers to bypass web origin policy via crafted HTML pages. This issue, tracked as CVE-2026-91719, was publicly disclosed on September 15, 2026, and last modified on September 18, 2026. The vulnerability has a CVSS score of 8.1, indicating high severity. Defenders should assess exposure and prioritize updating Google Chrome to version 153.0.8010.47 or later. The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions.

Vendor
Google
Product
Chrome
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-15
Original CVE updated
2026-09-18
Advisory published
2026-09-15
Advisory updated
2026-09-18

Who should care

Defenders responsible for managing Google Chrome deployments, as well as security teams focused on web browser security, should assess exposure and prioritize updating Google Chrome to version 153.0.8010.47 or later.

Why it matters

CVE-2026-91719 is a code injection vulnerability in XML in Google Chrome that allows remote attackers to bypass web origin policy. Defenders should prioritize verifying and applying the update, assessing exposure, and monitoring for potential bypass attempts.

  • Defenders need to verify and apply updates to Google Chrome to prevent potential bypass of web origin policy.
  • Security teams must assess exposure in their environment, focusing on systems and users that interact with Google Chrome.
  • The vulnerability's high CVSS score indicates a significant risk that defenders should address promptly.

Technical summary

The vulnerability, CVE-2026-91719, is a code injection issue in XML in Google Chrome prior to version 153.0.8010.47. This allows remote attackers to bypass web origin policy via crafted HTML pages. The CVSS score for this vulnerability is 8.1, indicating a high severity level.

Defensive priority

Defenders should prioritize verifying and applying the update to Google Chrome, ensuring that the version is 153.0.8010.47 or later, and assess exposure in their environment.

Recommended defensive actions

  • Verify and apply the update to Google Chrome, ensuring that the version is 153.0.8010.47 or later.
  • Assess exposure in the environment, focusing on systems and users that interact with Google Chrome.
  • Monitor for potential bypass attempts of web origin policy in Google Chrome.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. However, the corpus does not establish specific exploitation instances or impacts, requiring verification from official sources.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-91719 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-91719

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

  • CVE-2026-91719 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-91719

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

Supplemental references

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.