Analyst readout for executives and security teams
Plain-English summary
This is a serious Chrome browser flaw in ANGLE, Chrome's graphics translation layer. A remote attacker could use a crafted HTML page to trigger memory corruption and potentially run code on a user's device. The source bundle does not show active exploitation.
Executive priority
Treat this as urgent browser patching, not a wait-and-see item. The flaw enables possible code execution through web content, but current sources do not prove active exploitation.
Technical view
CVE-2026-9879 is a CWE-787 out-of-bounds write in ANGLE affecting Google Chrome prior to 148.0.7778.216. The CVSS 3.1 score is 8.8 with network attack vector, low complexity, no privileges required, and user interaction required. Impact is high for confidentiality, integrity, and availability.
Likely exposure
Organizations are exposed where users run Google Chrome versions prior to 148.0.7778.216, especially on managed desktops and laptops with web browsing enabled. The bundle does not identify other affected Chromium-based products.
Exploitation context
The described attack path is a crafted HTML page. User interaction is required, and the source bundle does not list CISA KEV inclusion or any cited evidence of exploitation in the wild.
Researcher notes
Key details are limited. The Chromium issue reference may restrict technical visibility. Validate exposure by version, not by attempting exploitation. Track the Chrome release blog and CVE record for any later details or exploitation signals.
Mitigation direction
- Update Google Chrome to 148.0.7778.216 or later where available.
- Confirm managed Chrome update policies force timely browser restarts.
- Prioritize internet-facing user workstations and high-risk browsing populations.
- Monitor Google's Chrome release guidance for any revised remediation instructions.
Validation and detection
- Inventory Chrome versions across endpoints and flag versions below 148.0.7778.216.
- Confirm updated browsers have restarted and are running the patched version.
- Check endpoint management reports for update failures or deferred browser restarts.
- Review security telemetry for suspicious browser crashes around untrusted web activity.
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-787: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-9879 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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:U/C:H/I:H/A:H 2.8 5.9 CISA-ADP Vulnerability scoring details
Base CVSS 3.1 score
8.8 HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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/499129768 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.