An authenticated user without repository read permission may access private NuGet metadata under specific conditions. (CVE-2026-66378)
CVE-2026-66378 is a vulnerability where an authenticated user without repository read permission may access private NuGet metadata under specific conditions. The issue does not allow modification or denial of service but results in limited information disclosure. The vulnerability has a CVSS score of 4.3, indicating medium severity. No patch or remediation details are provided, and no known exploits are reported in the wild.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-66378) allows an authenticated user lacking repository read permissions to access private NuGet metadata under certain conditions. The weakness is classified under CWE-862 (Missing Authorization). The impact is limited to confidentiality as only metadata can be accessed, with no integrity or availability impact. There is no information on affected versions or vendor-provided patches. The CVSS v3.1 base score is 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N), reflecting a network attack vector with low complexity and requiring low privileges but no user interaction.
Potential Impact
The impact is limited to unauthorized disclosure of private NuGet metadata. There is no impact on data integrity or system availability. The vulnerability requires authentication but bypasses repository read permission checks, potentially exposing sensitive metadata information to unauthorized users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the absence of an official fix, restrict access to authenticated users carefully and monitor for unusual access patterns. Follow vendor updates for any forthcoming patches or mitigations.
An authenticated user without repository read permission may access private NuGet metadata under specific conditions. (CVE-2026-66378)
Description
CVE-2026-66378 is a vulnerability where an authenticated user without repository read permission may access private NuGet metadata under specific conditions. The issue does not allow modification or denial of service but results in limited information disclosure. The vulnerability has a CVSS score of 4.3, indicating medium severity. No patch or remediation details are provided, and no known exploits are reported in the wild.
CVSS v3.1
Score 4.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-66378) allows an authenticated user lacking repository read permissions to access private NuGet metadata under certain conditions. The weakness is classified under CWE-862 (Missing Authorization). The impact is limited to confidentiality as only metadata can be accessed, with no integrity or availability impact. There is no information on affected versions or vendor-provided patches. The CVSS v3.1 base score is 4.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N), reflecting a network attack vector with low complexity and requiring low privileges but no user interaction.
Potential Impact
The impact is limited to unauthorized disclosure of private NuGet metadata. There is no impact on data integrity or system availability. The vulnerability requires authentication but bypasses repository read permission checks, potentially exposing sensitive metadata information to unauthorized users.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the absence of an official fix, restrict access to authenticated users carefully and monitor for unusual access patterns. Follow vendor updates for any forthcoming patches or mitigations.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9pg7-45vf-fg47
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-66378"]
- Ecosystems
- []
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a7c9b20bf8831d539cda403
Added to database: 08/12/2026, 16:11:12 UTC
Last enriched: 08/12/2026, 16:30:17 UTC
Last updated: 08/13/2026, 01:32:38 UTC
Views: 4
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