Analyst readout for executives and security teams
Plain-English summary
CVE-2026-9883 is a Google Chrome memory-safety flaw that could let a remote attacker run code if a user opens a crafted HTML page. It affects Chrome versions before 148.0.7778.216. The source bundle says Chromium rated it Critical; no KEV listing is provided.
Executive priority
Treat this as an urgent browser patching item. It is not KEV-listed in the provided data, but it is a high-impact Chrome remote code execution vulnerability requiring only user interaction with crafted web content.
Technical view
The vulnerability is a use-after-free issue in Chrome Base, tracked as CWE-416. CVSS 3.1 is 8.8 with network attack vector, low complexity, no privileges, required user interaction, unchanged scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Organizations with managed or unmanaged Chrome installations below 148.0.7778.216 are potentially exposed, especially where browser updates lag on endpoints. Evidence only names Google Chrome; no other Chromium-based products are stated in the provided sources.
Exploitation context
The bundle describes remote code execution via a crafted HTML page and marks KEV as false. It does not provide evidence of active exploitation, public exploit code, or exploitation in the wild.
Researcher notes
Public detail is limited in the supplied bundle. Avoid assuming exploitability beyond the CVE text: crafted HTML, user interaction, and arbitrary code execution are stated; exploit maturity and deeper root-cause details are not.
Mitigation direction
- Update Google Chrome to 148.0.7778.216 or later where applicable.
- Prioritize endpoints used for email, web browsing, and privileged administration.
- Confirm managed browser update policies are enforcing the fixed version.
- Review Google Chrome release guidance for any platform-specific notes.
- Monitor the Chromium issue and CVE record for revised guidance.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Flag any Chrome installation below 148.0.7778.216.
- Verify update telemetry after patch rollout completes.
- Check whether high-risk users still run vulnerable browser versions.
- Document exceptions and compensating controls for delayed updates.
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 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-2026-9883 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/506477192 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.