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CVE-2026-34778

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, a service worker running in a session could spoof reply messages on the internal IPC channel used by webContents.executeJavaScript() and related methods, causing the main-process promise to resolve with attacker-controlled data. Apps are only affected if they have service workers registered and use the result of webContents.executeJavaScrip
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:333f9d7f755323460537c54c6f63cb4c2ee659015fdd9262dd3d529190d05d73
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:235639834e133acd186c1903625c522dc89952cb9e6b540246c78c9aac342796 · sha256:4e4ff05925eb0646… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-290","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:235639834e133acd186c1903625c522dc89952cb9e6b540246c78c9aac342796 · sha256:4e4ff05925eb0646… · /containers/cna/problemTypes/0/descriptions/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_v5affected
    urn:baitaphish:normalized-source-record:v2:235639834e133acd186c1903625c522dc89952cb9e6b540246c78c9aac342796 · sha256:4e4ff05925eb0646… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:235639834e133acd186c1903625c522dc89952cb9e6b540246c78c9aac342796 · sha256:4e4ff05925eb0646… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:235639834e133acd186c1903625c522dc89952cb9e6b540246c78c9aac342796 · sha256:4e4ff05925eb0646… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-290","description":"CWE-290: Authentication Bypass by Spoofing","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:235639834e133acd186c1903625c522dc89952cb9e6b540246c78c9aac342796 · sha256:4e4ff05925eb0646… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/electron/electron/security/advisories/GHSA-xj5x-m3f3-5x3h","tags":["x_refsource_CONFIRM"],"url":"https://github.com/electron/electron/security/advisories/GHSA-xj5x-m3f3-5x3h"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:235639834e133acd186c1903625c522dc89952cb9e6b540246c78c9aac342796 · sha256:4e4ff05925eb0646… · /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.

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