Analyst readout for executives and security teams
Plain-English summary
This is a high-severity Chrome browser flaw in WebAudio. A user visiting a malicious or compromised web page could trigger memory misuse that may let an attacker run code inside Chrome’s sandbox. The source bundle does not show confirmed active exploitation.
Executive priority
Treat this as urgent browser patching, not a confirmed breach signal. Because the attack path is a web page and the impact is high, update Chrome quickly across managed endpoints and verify coverage.
Technical view
CVE-2026-9952 is a CWE-416 use-after-free in Google Chrome WebAudio before 148.0.7778.216. The CVSS 3.1 score is 8.8, reflecting network reachability, low attack complexity, no privileges required, and required user interaction through crafted HTML.
Likely exposure
Organizations with Google Chrome desktop installations below 148.0.7778.216 are the likely exposure. Risk is higher where browser updates are delayed, users browse untrusted sites, or managed endpoints lack rapid version enforcement.
Exploitation context
The provided CVE text says exploitation requires a crafted HTML page and user interaction. KEV is false in the bundle, and no cited source confirms exploitation in the wild. Chrome’s sandbox may limit direct system impact, but code execution remains serious.
Researcher notes
Evidence is limited to the CVE record, Chrome release reference, and Chromium issue reference. The bundle does not provide root-cause details, proof-of-concept status, exploit telemetry, or non-Chrome affected products.
Mitigation direction
- Update Google Chrome to 148.0.7778.216 or the vendor-designated fixed version.
- Confirm managed browser update policies are enforcing the fixed channel across desktop fleets.
- Prioritize users with high-risk browsing exposure or delayed endpoint patching.
- Monitor Google Chrome release notes and Chromium issue references for revised guidance.
Validation and detection
- Inventory Chrome desktop versions and identify installations below 148.0.7778.216.
- Check endpoint management reports for successful Chrome update deployment.
- Verify the vulnerability is absent after update by comparing installed versions to vendor guidance.
- Review security monitoring for suspicious browser crashes or alerts, without assuming confirmed exploitation.
Public sources used
Based on public source material and reviewed before publication.
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.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution 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 lookupCVE-2026-9952 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H 2.8 5.9 CISA-ADP Vulnerability scoring details
Base CVSS 3.1 score
8.8 HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reserved CVE Program
The CVE ID was reserved by the assigning CNA.
- CVE published CVE Program
The CVE record was published.
- CVE updated CVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 source CVE List V5
- https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html CVE reference, Chrome
- https://issues.chromium.org/issues/503929476 CVE reference, Chrome
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.