Analyst readout for executives and security teams
Plain-English summary
CVE-2026-9877 is a Chrome ANGLE use-after-free issue. If an attacker first compromises Chrome’s renderer, a crafted web page could potentially help escape the browser sandbox. That raises business risk because sandbox escape can turn a browser compromise into broader endpoint impact.
Executive priority
Treat this as urgent browser patching work. The issue is not documented as actively exploited here, but sandbox escape potential makes delayed remediation risky for endpoint security.
Technical view
Google describes a use-after-free in ANGLE affecting Chrome before 148.0.7778.216. The CVSS 3.1 score is 8.3 with network attack vector, required user interaction, high complexity, changed scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to Google Chrome desktop installations running versions before 148.0.7778.216. The provided sources do not identify other affected products, platforms, or downstream Chromium-based browsers.
Exploitation context
The CVE requires a remote attacker who has already compromised the renderer process, plus a crafted HTML page. The source bundle does not show CISA KEV listing or other evidence of active exploitation.
Researcher notes
The public description is sparse. The Chromium issue may have restricted details. Do not assume exploitability beyond the stated renderer-compromise prerequisite, crafted HTML trigger, affected Chrome versions, CWE-416 class, and vendor Critical severity.
Mitigation direction
- Update Google Chrome desktop to 148.0.7778.216 or later.
- Prioritize managed browser fleets and high-risk user groups.
- Confirm update completion, not just deployment availability.
- Check Google Chrome Releases for any revised vendor guidance.
Validation and detection
- Inventory Chrome desktop versions across managed endpoints.
- Flag any Chrome version earlier than 148.0.7778.216.
- Verify browser update telemetry after user relaunches.
- Review exposure for users handling untrusted web content.
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-2026-9877 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/496445460 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.