Security readout for executives and security teams
Plain-English summary
This Chrome flaw could let an attacker escape Chrome’s sandbox after first compromising the renderer process, typically through a malicious web page. That makes it serious, but not a one-click standalone compromise based on the supplied CVSS and description. No provided source states active exploitation.
Executive priority
Treat this as a high-priority browser update. It can enable sandbox escape after another browser compromise, which increases business risk from phishing and malicious sites. Patch promptly, but do not assume confirmed active exploitation from the supplied evidence.
Technical view
CVE-2026-9982 is a CWE-20 insufficient input validation issue in ANGLE in Google Chrome before 148.0.7778.216. A remote attacker with a compromised renderer could potentially escape the sandbox using crafted HTML. CVSS 8.3 reflects network reachability, required user interaction, high attack complexity, and high confidentiality, integrity, and availability impact.
Likely exposure
Organizations are exposed where managed or unmanaged endpoints run Google Chrome versions prior to 148.0.7778.216. Exposure is most relevant for desktop users who browse untrusted sites or receive links, especially where browser updates lag.
Exploitation context
The supplied sources do not show CISA KEV listing or active exploitation. The described attack requires user interaction and a prior renderer compromise, so this is most concerning as part of a chained browser exploit rather than as an isolated bug.
Researcher notes
Key constraints are the renderer-compromise prerequisite, crafted HTML trigger, ANGLE component, CWE-20 classification, and sandbox escape impact. Public details are limited, and the Chromium issue may restrict technical access. Avoid inferring exploitability beyond the provided CVSS and description.
Mitigation direction
- Update Google Chrome to 148.0.7778.216 or later where available.
- Verify enterprise browser update policies are enforcing current stable releases.
- Prioritize systems used by high-risk staff and internet-facing workflows.
- Check Google’s release guidance for platform-specific availability and follow-up fixes.
Validation and detection
- Inventory Chrome versions across managed endpoints.
- Confirm no Chrome installation remains below 148.0.7778.216.
- Review browser management telemetry for failed or delayed updates.
- Check CISA KEV and vendor advisories for any exploitation status changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-20: 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-2026-9982 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:H1.66CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8.3HighVector: 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 reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.htmlCVE reference, Chrome
- https://issues.chromium.org/issues/513001247CVE 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.