Analyst readout for executives and security teams
Plain-English summary
Chrome had a critical memory-safety flaw in Dawn, its WebGPU graphics component. A malicious webpage could potentially help an attacker escape Chrome’s sandbox on vulnerable versions. This raises urgency because browser sandbox escapes can turn normal web browsing into deeper device compromise risk.
Executive priority
Treat this as a rapid browser patching priority. There is no provided evidence of active exploitation, but the critical severity, sandbox-escape potential, and web-delivered attack path justify fast enterprise rollout and verification.
Technical view
CVE-2026-9874 is a CWE-416 use-after-free in Dawn in Google Chrome before 148.0.7778.216. CVSS 3.1 is 9.6 with network attack vector, low complexity, no privileges, required user interaction, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Managed and unmanaged desktops running Google Chrome versions earlier than 148.0.7778.216 are the likely exposure. The source bundle identifies Chrome and a crafted HTML page attack path; it does not name other Chromium-based browsers or operating systems.
Exploitation context
The sources describe potential sandbox escape via a crafted HTML page. User interaction is required by the CVSS vector. The bundle says KEV is false and provides no cited evidence of active exploitation, public exploit availability, or observed attacks.
Researcher notes
The public description is limited. The Chromium issue reference may contain restricted detail, so analysis should avoid assumptions about the exact trigger, exploitability beyond CVSS, or affected downstream products. Validate only version exposure and vendor guidance.
Mitigation direction
- Update Google Chrome to 148.0.7778.216 or later.
- Prioritize managed desktop browser fleets and high-risk user groups.
- Confirm auto-update policy is enabled and functioning.
- Restrict risky browsing on systems pending update where feasible.
- Monitor Google Chrome release notes for any revised guidance.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Confirm vulnerable versions are below 148.0.7778.216.
- Verify updated endpoints report 148.0.7778.216 or later.
- Check browser update telemetry for failed or deferred updates.
- Review exposure for users with elevated workstation access.
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-2026-9874 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
- Critical
- CVSS
- 9.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/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:L/PR:N/UI:R/S:C/C:H/I:H/A:H 2.8 6 CISA-ADP Vulnerability scoring details
Base CVSS 3.1 score
9.6 CriticalVector: CVSS:3.1/AV:N/AC:L/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/500609038 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.