Security readout for executives and security teams
Plain-English summary
This affects some Electron desktop apps, not every Electron installation. If an app lets untrusted configuration flow into webPreferences, an attacker could add renderer command-line switches that weaken sandboxing or web security. Electron has fixed the issue in supported patched versions.
Executive priority
Treat as high priority for organizations building or distributing Electron desktop apps, especially configurable clients. Patch internal builds promptly and require vendor statements for third-party Electron apps. Broad emergency response is not supported by the provided evidence without confirmed exploitation.
Technical view
An undocumented commandLineSwitches webPreference allowed arbitrary renderer process switches before Electron 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8. Exposure depends on applications spreading external or untrusted objects into webPreferences without an allowlist. Fixed, hardcoded webPreferences objects are not affected.
Likely exposure
Likely limited to Electron applications that accept plugin, workspace, user, or remote configuration and merge it into webPreferences. Organizations using packaged Electron apps need vendor confirmation; internally built Electron apps should be reviewed directly. Hardcoded webPreferences materially reduce exposure.
Exploitation context
The source bundle does not show KEV listing or confirmed active exploitation. CVSS indicates local attack vector, high complexity, no privileges required, and user interaction required. The practical risk is highest where attacker-controlled configuration can influence Electron window creation.
Researcher notes
Focus triage on data flow into webPreferences, not just Electron version presence. The vulnerable pattern is untrusted object spreading or equivalent dynamic construction. The provided sources identify affected Electron ranges and patched versions, but do not provide product-specific downstream exposure.
Mitigation direction
- Upgrade Electron to 38.8.6, 39.8.0, 40.7.0, 41.0.0-beta.8, or later.
- Audit webPreferences construction and remove spreading of untrusted configuration objects.
- Use an explicit allowlist for accepted webPreferences keys.
- Reject or ignore commandLineSwitches in externally supplied configuration.
- Ask third-party Electron application vendors for CVE-2026-34769 status.
Validation and detection
- Inventory Electron versions used by internal and packaged desktop applications.
- Review BrowserWindow creation paths for external data reaching webPreferences.
- Confirm webPreferences are fixed or built from an explicit allowlist.
- Check dependency lockfiles and packaged artifacts for patched Electron versions.
- Document vendor responses for third-party Electron-based applications.
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-88: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupCWE-912: 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-2026-34769 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/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
2 official scoresWe 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:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H16GitHub_MCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H16redhat-SADPVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Base CVSS 3.1 score
7.7HighVector: CVSS:3.1/AV:L/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.
- ADP timelineredhat-SADP
Made public.
- CVE publishedCVE Program
The CVE record was published.
- ADP timelineredhat-SADP
Reported to Red Hat.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-04-04T00:01:24.619Z: Reported to Red Hat.
- 2026-04-03T23:33:55.952Z: Made public.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/electron/electron/security/advisories/GHSA-9wfr-w7mm-pc7fCVE reference, GitHub_M · x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2026-34769CVE reference, redhat-SADP · vdb-entry, x_refsource_REDHAT
- RHBZ#2455004CVE reference, redhat-SADP · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34769.jsonCVE reference, redhat-SADP · x_sadp-csaf-vex
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.
Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Hidden Functionality
Hidden Functionality represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.