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PatchSiren cyber security CVE debrief

CVE-2026-50519 Microsoft CVE debrief

CVE-2026-50519 is a medium-severity vulnerability (CVSS score of 6.5) affecting GitHub Copilot and Visual Studio Code. The vulnerability allows an unauthorized attacker to disclose information over a network due to the initialization of a resource with an insecure default. This CVE was published on June 19, 2026, and has not been modified since its publication. The affected product and vendor are not explicitly stated, but there is a reference to Microsoft as a potential vendor. Defenders should assess their exposure and prioritize patching or mitigating this vulnerability.

Vendor
Microsoft
Product
GitHub Copilot
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-19
Original CVE updated
2026-08-17
Advisory published
2026-06-19
Advisory updated
2026-08-17

Who should care

Developers and administrators using GitHub Copilot and Visual Studio Code should be aware of this vulnerability and assess their exposure. Additionally, security teams and IT professionals responsible for patching and vulnerability management should prioritize this CVE and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by the initialization of a resource with an insecure default in GitHub Copilot and Visual Studio Code. This allows an unauthorized attacker to disclose information over a network. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N, indicating a medium-severity vulnerability. The weakness associated with this CVE is CWE-1188.

Defensive priority

Medium priority due to CVSS score of 6.5 and potential for information disclosure

Recommended defensive actions

  • Inventory and review instances of GitHub Copilot and Visual Studio Code for exposure
  • Apply patches or updates provided by the vendor to address the vulnerability
  • Review and update security configurations to ensure secure defaults
  • Monitor for suspicious activity or potential exploits
  • Consider implementing compensating controls to limit exposure

Evidence notes

The primary evidence for this CVE is the NVD detail page and the CVE record on CVE.org. The source item URL provides additional information about the vulnerability. The vendor is listed as 'Unknown Vendor', but there is a reference to Microsoft as a potential vendor. Defenders should verify the affected product and version from official sources.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50519 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50519

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50519 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50519

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.