Analyst readout for executives and security teams
Plain-English summary
This Chrome vulnerability could let a malicious website read small amounts of data it should not access across site boundaries. User interaction is required, and the CVSS impact is limited to confidentiality, but browser cross-origin leaks can matter for users handling sensitive web applications.
Executive priority
Treat as a timely browser patching item, not a crisis. The business risk is data leakage from user browsing sessions, with no sourced evidence of active exploitation in the provided bundle.
Technical view
CVE-2026-9935 is a CWE-457 uninitialized-use issue in ANGLE affecting Google Chrome before 148.0.7778.216. The reported outcome is cross-origin data leakage through a crafted HTML page. CVSS 3.1 is 4.3, while Chromium rated the security severity High.
Likely exposure
Organizations with Chrome endpoints running versions before 148.0.7778.216 are potentially exposed, especially where users access sensitive SaaS, identity, finance, healthcare, or internal web applications in Chrome.
Exploitation context
The bundle does not show CISA KEV listing or reported active exploitation. The described attack requires a remote attacker to get a user to interact with a crafted HTML page, with confidentiality impact only.
Researcher notes
Public detail is limited. The sources identify ANGLE, uninitialized use, cross-origin data leakage, crafted HTML, and the fixed Chrome version. They do not provide reliable exploit mechanics, affected platforms beyond Chrome, or alternate mitigations.
Mitigation direction
- Update Chrome to 148.0.7778.216 or later where available.
- Confirm enterprise auto-update policies are active and succeeding.
- Prioritize users handling sensitive web applications or privileged sessions.
- Check Google Chrome release guidance for any additional vendor instructions.
Validation and detection
- Inventory managed endpoints for Chrome versions before 148.0.7778.216.
- Confirm updated endpoints report Chrome 148.0.7778.216 or later.
- Review browser management logs for failed or deferred updates.
- Track the Chromium issue for any newly disclosed technical detail.
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-457: 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 lookupCVE-2026-9935 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
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
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:L/I:N/A:N 2.8 1.4 CISA-ADP Vulnerability scoring details
Base CVSS 3.1 score
4.3 MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
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/501584689 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 of Uninitialized Variable
Use of Uninitialized Variable represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.