Analyst readout for executives and security teams
Plain-English summary
A flaw in Chrome's ANGLE graphics component could let an attacker escape Chrome's sandbox after first compromising the renderer. The source describes attack delivery through a crafted HTML page, so user browsing activity is part of the risk. The reported severity is High, with potential confidentiality, integrity, and availability impact.
Executive priority
Treat as a high-priority browser update. It is not listed as known exploited in the provided data, but the potential sandbox escape impact justifies prompt fleet validation and remediation, especially on endpoints used for email, web research, and privileged administration.
Technical view
CVE-2026-9926 is a heap buffer overflow (CWE-122) in ANGLE in Google Chrome before 148.0.7778.216. The CVSS 3.1 score is 8.3 with network attack vector, high complexity, required user interaction, changed scope, and high CIA impact. The attacker must already have compromised the renderer process to potentially perform sandbox escape.
Likely exposure
Organizations running Google Chrome versions earlier than 148.0.7778.216 are the stated exposure. The provided sources do not identify other Chromium-based products, platforms, or embedded ANGLE users as affected, so those should not be assumed without vendor confirmation.
Exploitation context
The CVE describes a crafted HTML page and a prerequisite renderer compromise. KEV status is false in the provided bundle, and no cited source states active exploitation. Risk remains significant because sandbox escape can turn a browser compromise into broader host impact.
Researcher notes
Available public detail is limited. The issue is identified as ANGLE heap buffer overflow with sandbox escape potential after renderer compromise. Do not infer exploit reliability, exploit chains, or affected non-Chrome products from the provided data. The Chromium issue may contain restricted details.
Mitigation direction
- Update Google Chrome to 148.0.7778.216 or later where available.
- Prioritize managed desktop browsers and high-risk user groups.
- Confirm Chrome auto-update policies are enabled and functioning.
- Check Google Chrome release guidance for any follow-up remediation details.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Flag any Chrome installation below 148.0.7778.216.
- Review browser management telemetry for update failures or disabled auto-update.
- Monitor vendor release notes and CVE updates for revised affected-version guidance.
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-2026-9926 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/500540748 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.