GHSA-p2rr-rvmm-c5fp CVE-2026-70612
Electron: Sandboxed iframes can launch external protocol handlers
- Severity
- 5.4 / 10
- Medium · CVSS 3.1
- Exploit chance (EPSS)
- 0.43%
- Chance of exploitation in the next 30 days. Higher than 37.18% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-284 Improper Access Control
- Fix
39.8.8- Upgrade electron to this version or later
Description
Impact
Requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame's sandbox state was also not made available to the app's permission handlers.
Apps are only affected if they render untrusted content in sandboxed iframes and grant the openExternal permission (granted by default when no setPermissionRequestHandler is installed). Apps whose permission handler denies openExternal for untrusted content are not affected.
Workarounds
Install a setPermissionRequestHandler that denies the openExternal permission for untrusted content.
Fixed Versions
42.0.0-beta.341.2.140.9.039.8.8
For more information
If you have any questions or comments about this advisory, email Electron at security@electronjs.org
Affected versions
npm
| Package | Vulnerable | Fixed in |
|---|---|---|
| electron | < 39.8.8 |
39.8.8 |
| electron | >= 40.0.0-alpha.1, < 40.9.0 |
40.9.0 |
| electron | >= 41.0.0-alpha.1, < 41.2.1 |
41.2.1 |
| electron | >= 42.0.0-alpha.1, < 42.0.0-beta.3 |
42.0.0-beta.3 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
electron npm → 39.8.8
- npm
npm install electron@39.8.8- yarn
yarn add electron@39.8.8- pnpm
pnpm add electron@39.8.8
Severity breakdown
CVSS 3.1 5.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Weakness
CWE-284: Improper Access Control
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
How to prevent it
- Architecture and Design, Operation: Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Architecture and Design: Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
References
Packages
Other links
- github.com/electron/electron/security/advisories/GHSA-p2rr-rvmm-c5fp
- github.com/electron/electron/pull/50961
- github.com/electron/electron/pull/50962
- github.com/electron/electron/pull/50963
- github.com/electron/electron/pull/50964
- github.com/electron/electron/commit/08b9d0a220e267d1a2402a44bdd01a2e9aa320b5
- github.com/electron/electron/commit/2764e4c35168855f614876051823db4f58a3714a
- github.com/electron/electron/commit/477dcf7afc6550715f9ec5e6f39ee38e5dd7bf39
- github.com/electron/electron/commit/c39e3d5687d57434c8d5fe814c5152efd2f631c3
- github.com/electron/electron/releases/tag/v39.8.8
- github.com/electron/electron/releases/tag/v40.9.0
- github.com/electron/electron/releases/tag/v41.2.1
- github.com/electron/electron/releases/tag/v42.0.0-beta.3
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
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|---|---|---|
| GHSA-qqvq-6xgj-jw8g Electron affected by libvpx's heap buffer overflow in vp8 encoding | High Known exploited | Also affects electron |
| GHSA-j7hp-h8jx-5ppr libwebp: OOB write in BuildHuffmanTable | High Known exploited | Also affects electron |
| GHSA-995f-9x5r-2rcj Heap buffer overflow in GPU | Critical Known exploited | Also affects electron |
| GHSA-jr5w-w6x2-84p9 Electron: Mitigation for compromised eMudhra intermediate certificates | High | Also affects electron |
| GHSA-h3v5-h239-pg29 Electron: Off-screen rendering on macOS trusts GPU-supplied frame geometry | Low | Also affects electron |
| GHSA-3qxv-5xgr-q7w9 Electron: Frame subscription trusts GPU-supplied frame geometry | Low | Also affects electron |
| GHSA-997q-gvvc-jwmx Electron: openExternal permission requests can be attributed to the wrong origin | Medium | Also affects electron |
| GHSA-fw47-9c62-h3vw Electron: HID and USB permission checks can be attributed to the wrong origin | Medium | Also affects electron |
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