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CVE-2026-11303 Google CVE debrief

CVE-2026-11303 is a use-after-free vulnerability in PDFium in Google Chrome prior to 149.0.7827.53. This vulnerability allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted PDF file. The CVSS score for this vulnerability is 8.8, indicating a high severity. The vulnerability was published on [cvePublishedAt] and modified on [cveModifiedAt].

Vendor
Google
Product
Chrome
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-07-23
Advisory published
2026-06-05
Advisory updated
2026-07-23

Who should care

Users of Google Chrome prior to version 149.0.7827.53 should update to the latest version to mitigate this vulnerability.

Technical summary

The vulnerability is a use-after-free issue in PDFium, a library used by Google Chrome to render PDF files. This type of vulnerability occurs when a program tries to use memory after it has been freed, which can lead to arbitrary code execution.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.53 or later.

Evidence notes

The CVE record and NVD detail can be found at [resourceLinkAnnotations:cve-org] and [resourceLinkAnnotations:nvd], respectively. Additional information can be found in the Chrome release notes at [resourceLinkAnnotations:ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11303 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11303

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

  • CVE-2026-11303 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11303

    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.