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CVE-2026-34773

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 Windows, app.setAsDefaultProtocolClient(protocol) did not validate the protocol name before writing to the registry. Apps that pass untrusted input as the protocol name may allow an attacker to write to arbitrary subkeys under HKCU\Software\Classes\, potentially hijacking existing protocol handlers. Apps are only affected if they call ap
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3ac5820bd87704d1f34317e67c4de7feb4d2553934b161a93a9cb1cd623c603c
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-74","description":"CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:969568aa92cefb803022351d1a0cf3ee832c6df18937476c981ad27f85f3ea87 · sha256:ff5e90750faae492… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:969568aa92cefb803022351d1a0cf3ee832c6df18937476c981ad27f85f3ea87 · sha256:ff5e90750faae492… · /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:v2:969568aa92cefb803022351d1a0cf3ee832c6df18937476c981ad27f85f3ea87 · sha256:ff5e90750faae492… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:969568aa92cefb803022351d1a0cf3ee832c6df18937476c981ad27f85f3ea87 · sha256:ff5e90750faae492… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-74","description":"CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:969568aa92cefb803022351d1a0cf3ee832c6df18937476c981ad27f85f3ea87 · sha256:ff5e90750faae492… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:969568aa92cefb803022351d1a0cf3ee832c6df18937476c981ad27f85f3ea87 · sha256:ff5e90750faae492… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/electron/electron/security/advisories/GHSA-mwmh-mq4g-g6gr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/electron/electron/security/advisories/GHSA-mwmh-mq4g-g6gr"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:969568aa92cefb803022351d1a0cf3ee832c6df18937476c981ad27f85f3ea87 · sha256:ff5e90750faae492… · /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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