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CVE Record

CVE-2026-16421: Inappropriate implementation in WebAudio in Google Chrome prior to 150.0.7871.182 allowed a remote attacker...

Inappropriate implementation in WebAudio in Google Chrome prior to 150.0.7871.182 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A malicious website could abuse Chrome’s WebAudio handling to run attacker-controlled code within the browser sandbox. Chromium rates the flaw High. Successful exploitation requires a user to load crafted HTML; the supplied evidence does not show code execution outside the sandbox.

Executive priority

Treat this as a high-priority browser update because exposure can occur through ordinary web browsing and successful exploitation enables sandboxed code execution. Accelerate deployment, especially on administrator and high-value endpoints, while avoiding claims of active exploitation unsupported by the supplied evidence.

Technical view

CVE-2026-16421 is an inappropriate WebAudio implementation affecting Google Chrome before 150.0.7871.182. Crafted HTML can trigger arbitrary code execution inside Chrome’s sandbox. The source bundle provides no CVSS score, CWE classification, root-cause details, or evidence of a sandbox escape.

Likely exposure

Chrome installations running versions earlier than 150.0.7871.182 are potentially exposed when users visit attacker-controlled or compromised webpages containing crafted HTML. Exposure depends on browser version and successful delivery of malicious web content.

Exploitation context

The supplied record does not report active exploitation, and the CVE is not listed as KEV in the bundle. A remote attacker must persuade or redirect a user to crafted HTML. Public evidence supplied here does not establish exploit availability, reliability, or sandbox escape capability.

Researcher notes

Available evidence identifies WebAudio and crafted HTML but omits the underlying implementation error, affected platforms, CVSS vector, CWE, and reproducibility details. The impact is explicitly limited to arbitrary code execution inside a sandbox; a separate sandbox escape would be required for broader system compromise, but no such chain is documented here.

Mitigation direction

  • Update Google Chrome to version 150.0.7871.182 or later.
  • Prioritize browsers used for internet access and privileged administrative work.
  • Confirm enterprise browser policies are successfully enforcing automatic updates.
  • Review current Google and Chromium guidance for any additional mitigations.

Validation and detection

  • Inventory deployed Chrome versions across managed endpoints.
  • Flag every installation older than 150.0.7871.182.
  • Verify updated browsers report the expected version after restarting.
  • Confirm update compliance through endpoint or browser-management telemetry.
  • Monitor vendor references for revised affected-version or exploitation information.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-16421 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
1ADP providers
3Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
GoogleChrome150.0.7871.182Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.