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01 Record

CVE-2026-70604

Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin reads

HighPUBLISHEDCNA: GitHub_M
CNA base score7.4 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

02 Description

Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin reads

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.35% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 28.8% of scored records. A rank, not a probability.
NVD base score
7.4 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
NVD analysis status
Analyzed. NVD last modified this record on 2026-10-08.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-08-05 15:59Z2 MO AGO
Last updated
2026-08-05 18:41Z2 MO AGO
Reserved
2026-08-04
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
High (CVSS 7.4)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Weaknesses
  • CWE-942Permissive Cross-domain Security Policy with Untrusted DomainsVariant
Data version
5.2
Document digest
7ad0271a5da44ea7825d87c9fe01de8f5540cd87a336301a00e15d3839ad541b

05 Affected products

VendorProductVersionsPlatforms
electronelectron< 39.8.10, >= 40.0.0-alpha.1, < 40.9.3, >= 41.0.0-alpha.1, < 41.4.0, >= 42.0.0-alpha.1, < 42.0.0—

06 References