CVE-2026-42347 Overview
CVE-2026-42347 is a rejected CVE identifier. The MITRE CVE program marked this candidate as a duplicate and instructed all users to reference CVE-2026-28496 instead. No vulnerability research, advisory, or technical analysis should rely on CVE-2026-42347 as an authoritative reference.
Rejected CVEs typically result from duplicate assignments by different CVE Numbering Authorities (CNAs) or administrative cleanup. The original technical content, affected products, severity scoring, and remediation guidance live under the consolidated identifier CVE-2026-28496.
Critical Impact
CVE-2026-42347 carries no independent technical impact. Security teams must redirect detection rules, vulnerability management tickets, and reporting workflows to CVE-2026-28496.
Affected Products
- No products are tracked under this rejected identifier
- Refer to CVE-2026-28496 for the authoritative product list
- Vendor advisories will not reference CVE-2026-42347
Discovery Timeline
- 2026-05-26 - CVE-2026-42347 published to NVD in rejected status
- 2026-05-26 - Last modified in NVD database, confirming duplicate designation
Technical Details for CVE-2026-42347
Vulnerability Analysis
CVE-2026-42347 contains no technical vulnerability data. The CVE record exists only as a placeholder marker indicating that the identifier was assigned in error or as a duplicate of an existing entry. The MITRE rejection notice directs all consumers to CVE-2026-28496 for the underlying issue.
Duplicate CVE assignments occur when two CNAs independently issue identifiers for the same underlying defect, or when a researcher submits the same report through multiple channels. The CVE program resolves these conflicts by retaining one identifier as canonical and rejecting the others. The rejected entry remains in the catalog for traceability so downstream tools do not break when encountering historical references.
Root Cause
The root cause is administrative rather than technical. CVE-2026-42347 duplicates CVE-2026-28496, and MITRE consolidated the records under the earlier identifier.
Attack Vector
No attack vector applies to this rejected identifier. Threat modeling and exploitation analysis should reference CVE-2026-28496.
No verified proof-of-concept or exploitation code applies to this identifier. Consult the canonical record at CVE-2026-28496 for any technical details, references, and remediation steps published by the assigning CNA.
Detection Methods for CVE-2026-42347
Indicators of Compromise
- No indicators of compromise are associated with this rejected CVE
- Detection content should be authored against CVE-2026-28496 instead
- Vulnerability scanners that report CVE-2026-42347 should be updated to map findings to the canonical identifier
Detection Strategies
- Audit vulnerability management platforms to remove or alias CVE-2026-42347 entries to CVE-2026-28496
- Update SIEM correlation rules and threat intelligence feeds that reference the rejected identifier
- Verify that asset inventory and patch tracking tools do not generate duplicate tickets for the same underlying issue
Monitoring Recommendations
- Monitor NVD and MITRE feeds for status changes on both CVE-2026-42347 and CVE-2026-28496
- Review vendor advisories under the canonical CVE for any new affected product disclosures
- Confirm that automated reporting dashboards reconcile rejected CVEs against their replacements
How to Mitigate CVE-2026-42347
Immediate Actions Required
- Treat CVE-2026-42347 as a non-actionable record and redirect all remediation efforts to CVE-2026-28496
- Update internal documentation, runbooks, and ticketing systems to reflect the duplicate designation
- Communicate the rejection to stakeholders who may have received automated alerts referencing this identifier
Patch Information
No patches are issued against CVE-2026-42347 because no independent vulnerability exists. Patch guidance, fixed versions, and vendor advisories are published under CVE-2026-28496.
Workarounds
- No workarounds apply to a rejected CVE identifier
- Apply mitigations published under the canonical CVE-2026-28496 record
- Maintain a mapping table that links rejected CVEs to their canonical replacements to prevent reporting gaps
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
