CVE Explorer
CVE-2026-34776
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, on macOS and Linux, apps that call app.requestSingleInstanceLock() were vulnerable to an out-of-bounds heap read when parsing a crafted second-instance message. Leaked memory could be delivered to the app's second-instance event handler. This issue is limited to processes running as the same user as the Electron app. Apps that do not call a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"electron","vendor":"electron","versions":[{"status":"affected","version":"< 38.8.6"},{"status":"affected","version":">= 39.0.0-alpha.1, < 39.8.1"},{"status":"affected","version":">= 40.0.0-alpha.1, < 40.8.1"},{"status":"affected","version":">= 41.0.0-alpha.1, < 41.0.0"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:13bc51b85e0ca6a1316998929e4f166e28b7ff8a560c57a98ff9942fda397a06 · sha256:01513043c7958a98… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:13bc51b85e0ca6a1316998929e4f166e28b7ff8a560c57a98ff9942fda397a06 · sha256:01513043c7958a98… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-125","description":"CWE-125: Out-of-bounds Read","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:13bc51b85e0ca6a1316998929e4f166e28b7ff8a560c57a98ff9942fda397a06 · sha256:01513043c7958a98… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/electron/electron/security/advisories/GHSA-3c8v-cfp5-9885","tags":["x_refsource_CONFIRM"],"url":"https://github.com/electron/electron/security/advisories/GHSA-3c8v-cfp5-9885"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:13bc51b85e0ca6a1316998929e4f166e28b7ff8a560c57a98ff9942fda397a06 · sha256:01513043c7958a98… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.