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PatchSiren cyber security CVE debrief

CVE-2026-113246 Google CVE debrief

A memory corruption vulnerability exists in Google Chrome's iOSWebView on iOS prior to version 156.0.8078.47. This issue, reported as having a Medium severity by Chromium, could potentially allow a remote attacker to read memory inside the sandbox via a crafted HTML page. The vulnerability was reported in the CVE record and source item, which provide details on the affected versions and potential impacts. To address this issue, defenders should verify exposure of iOS devices using Google Chrome, especially if those devices access untrusted or third-party websites, and prioritize updates to version 156.0.8078.47 or later.

Vendor
Google
Product
Chrome
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-20
Original CVE updated
2026-10-21
Advisory published
2026-10-20
Advisory updated
2026-10-21

Who should care

Defenders responsible for managing and securing iOS devices using Google Chrome should assess exposure and prioritize updates. This includes IT and security teams in organizations using Chrome on iOS for browsing.

Why it matters

This memory corruption vulnerability in Google Chrome's iOSWebView on iOS prior to version 156.0.8078.47 could allow remote attackers to potentially read memory inside the sandbox via crafted HTML pages. Defenders should verify exposure, especially for devices accessing untrusted websites, and prioritize updates.

  • Verify exposure of iOS devices using Google Chrome prior to version 156.0.8078.47.
  • Assess potential for remote attackers to read memory inside the sandbox.
  • Prioritize updates to version 156.0.8078.47 or later for iOS devices.

Technical summary

The vulnerability exists in Google Chrome's iOSWebView on iOS prior to version 156.0.8078.47. It allows a remote attacker to potentially read memory inside the sandbox via a crafted HTML page. This issue is reported to have a Medium severity by Chromium. The CVE record and source item provide details on the vulnerability, including its existence in Chrome versions prior to 156.0.8078.47 on iOS. Defenders should prioritize verifying exposure of iOS devices using Google Chrome, especially if those devices access untrusted or third-party websites, and implement additional security measures to mitigate potential impacts.

Defensive priority

Defenders should prioritize verifying exposure of iOS devices using Google Chrome, especially if those devices access untrusted or third-party websites.

Recommended defensive actions

  • Verify iOS devices using Google Chrome are updated to version 156.0.8078.47 or later.
  • Monitor iOS devices for unusual activity, especially if they access untrusted websites.
  • Implement additional security measures for iOS devices, such as using a secure web browser or a VPN.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE record and source item provide details on the vulnerability, including its existence in Chrome versions prior to 156.0.8078.47 on iOS. However, specifics about exploitation or victim impact are not provided.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-113246 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-113246

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

  • CVE-2026-113246 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-113246

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

Supplemental references

  • CVE-2026-113246

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/113xxx/CVE-2026-113246.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://issues.chromium.org/issues/523705767

    Supplemental source

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.