Analyst readout for executives and security teams
Plain-English summary
This Chrome flaw affects ANGLE, a graphics component. If an attacker already compromises Chrome’s renderer, a crafted HTML page could help escape the browser sandbox, turning a browser compromise into broader system risk. The source bundle does not show active exploitation.
Executive priority
Treat as a high-priority browser patching item. The sandbox-escape impact is serious, but the available evidence does not support emergency active-exploitation claims.
Technical view
CVE-2026-9915 is a CWE-122 heap buffer overflow in ANGLE in Google Chrome before 148.0.7778.216. The CVSS 3.1 score is 8.3 with network attack vector, high attack complexity, required user interaction, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Organizations with Google Chrome versions earlier than 148.0.7778.216 are the relevant exposure group. Risk is highest where browser patching lags or users routinely browse untrusted web content.
Exploitation context
The CVE requires a compromised renderer process and user interaction with a crafted HTML page. KEV status is false in the supplied bundle, and no cited source states active exploitation.
Researcher notes
This issue is only described at a high level publicly: ANGLE heap overflow, renderer compromise prerequisite, sandbox escape potential. Avoid assuming a standalone remote code execution path without additional vendor detail.
Mitigation direction
- Update Google Chrome to 148.0.7778.216 or later.
- Prioritize managed desktop fleets and high-risk user groups.
- Check Google’s Chrome release guidance for any platform-specific instructions.
- Keep browser auto-update policies enabled and monitored.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Confirm installed versions are 148.0.7778.216 or later.
- Review patch compliance dashboards for lagging systems.
- Monitor vendor advisories for updates to exploit or mitigation status.
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-122: 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-2026-9915 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/500063836 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.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.