CVE-2026-102677
Electron: Sandboxed preload code cache can be poisoned by a compromised renderer
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload context. The issue affects applications that load untrusted content. This issue is fixed in versions 42.10.0, 43.5.0, and 44.0.0-beta.6.
INFO
Published Date :
Sept. 29, 2026, 6:17 p.m.
Last Modified :
Oct. 8, 2026, 8:24 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Electron to version 42.10.0 or later.
- Update Electron to version 43.5.0 or later.
- Update Electron to version 44.0.0-beta.6 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-102677.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-102677 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-102677
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-102677 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-102677 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Oct. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:electronjs:electron:44.0.0:alpha1:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:alpha2:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:alpha3:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:alpha4:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:alpha5:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:alpha6:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:alpha7:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:alpha8:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:alpha9:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:beta1:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:beta2:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:beta3:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:44.0.0:beta4:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:* versions from (including) 42.3.3 up to (including) 42.10.0 *cpe:2.3:a:electronjs:electron:44.0.0:beta5:*:*:*:node.js:*:* *cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:* versions from (including) 43.0.0 up to (excluding) 43.4.2 Added Reference Type GitHub, Inc.: https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/electron/electron/pull/52480 Types: Issue Tracking, Patch Added Reference Type GitHub, Inc.: https://github.com/electron/electron/releases/tag/v42.10.0 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/electron/electron/releases/tag/v43.5.0 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/electron/electron/releases/tag/v44.0.0-beta.6 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 02, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-102677', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T12:18:07.959498Z'} -
New CVE Received by [email protected]
Sep. 29, 2026
Action Type Old Value New Value Added Description Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload context. The issue affects applications that load untrusted content. This issue is fixed in versions 42.10.0, 43.5.0, and 44.0.0-beta.6. Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-20 Added CWE CWE-345 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/102xxx/CVE-2026-102677.json">CVE-2026-102677</a> Added Reference https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601 Added Reference https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3 Added Reference https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217 Added Reference https://github.com/electron/electron/pull/52480 Added Reference https://github.com/electron/electron/releases/tag/v42.10.0 Added Reference https://github.com/electron/electron/releases/tag/v43.5.0 Added Reference https://github.com/electron/electron/releases/tag/v44.0.0-beta.6 Added Reference https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq