Analyst readout for executives and security teams
Plain-English summary
CVE-2026-9904 is a high-severity Google Chrome vulnerability in ANGLE, Chrome's graphics layer. A malicious web page could potentially help an attacker escape the browser sandbox after user interaction. The provided sources do not show active exploitation, but browser sandbox escape issues can materially increase endpoint risk.
Executive priority
Treat this as a prompt browser patching priority, not a panic event. The impact could be serious if chained with web delivery, but current provided evidence does not confirm active exploitation.
Technical view
The issue is a CWE-416 use-after-free in ANGLE affecting Google Chrome prior to 148.0.7778.216. CVSS 3.1 is 8.3 with network attack vector, no privileges required, user interaction required, high complexity, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Organizations with managed or unmanaged Google Chrome installations older than 148.0.7778.216 are the likely exposure set, especially endpoints where users browse untrusted sites or receive links from external sources.
Exploitation context
The provided bundle states a remote attacker could potentially perform a sandbox escape using a crafted HTML page. KEV is false, and the provided sources do not state that exploitation is active in the wild.
Researcher notes
Public detail is limited in the provided bundle. The Chromium issue is cited, but no exploit mechanics or full root-cause detail are included here. Avoid assuming exploit availability or additional affected products beyond Chrome and ANGLE.
Mitigation direction
- Update Google Chrome to 148.0.7778.216 or later where applicable.
- Prioritize browser updates for internet-facing user workstations and high-risk roles.
- Check Google and Chromium guidance for any revised mitigation details.
- Ensure managed browser auto-update policies are enabled and enforced.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Confirm systems are at 148.0.7778.216 or later where applicable.
- Review update telemetry for failed or deferred browser updates.
- Track Chrome release notes and Chromium issue updates for new details.
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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-9904 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
- 8.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/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:H/PR:N/UI:R/S:C/C:H/I:H/A:H 1.6 6 CISA-ADP Vulnerability scoring details
Base CVSS 3.1 score
8.3 HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/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/498804020 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.