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PatchSiren cyber security CVE debrief

CVE-2026-12025 Google CVE debrief

CVE-2026-12025 is a vulnerability in Google Chrome prior to version 149.0.7827.115. The issue is related to insufficient validation of untrusted input in the Network component, which could allow a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page. The Chromium security severity of this vulnerability is rated as High, and the CVSS score is 5.3, with a severity rating of MEDIUM.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-12
Advisory published
2026-06-11
Advisory updated
2026-06-12

Who should care

Users of Google Chrome prior to version 149.0.7827.115 are affected by this vulnerability. An attacker who has compromised the renderer process can exploit this issue to leak cross-origin data.

Technical summary

The vulnerability is caused by insufficient validation of untrusted input in the Network component of Google Chrome. This can be exploited by a remote attacker who has compromised the renderer process to leak cross-origin data via a crafted HTML page.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.115 or later.

Evidence notes

The CVE record for CVE-2026-12025 was obtained from the official CVE.org website [cve-org]. Additional details were obtained from the National Vulnerability Database (NVD) [nvd].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12025 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12025

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

  • CVE-2026-12025 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12025

    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.