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CVE-2026-58630 Microsoft CVE debrief

The CVE-2026-58630 vulnerability is a critical security issue in Azure App Service For Linux, caused by improper access control. This allows unauthorized attackers to elevate privileges over a network. The vulnerability has a CVSS score of 10 and is classified as CWE-284. Security teams and administrators responsible for Azure App Service For Linux deployments should be aware of this critical vulnerability and take immediate action to assess and mitigate potential exposure. The CVE record was published on 2026-07-24T15:18:47.847Z and has not been modified since then. Affected product deployments should be reviewed for potential exposure, and compensating controls should be implemented to limit network access to sensitive resources.

Vendor
Microsoft
Product
Azure App Service For Linux
CVSS
CRITICAL 10
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-24
Original CVE updated
2026-08-06
Advisory published
2026-07-24
Advisory updated
2026-08-06

Who should care

Security teams and administrators responsible for Azure App Service For Linux deployments should be aware of this critical vulnerability and take immediate action to assess and mitigate potential exposure. They should review and apply the vendor advisory from Microsoft, inventory and assess Azure App Service For Linux deployments for potential exposure, and implement compensating controls to limit network access to sensitive resources.

Technical summary

The CVE-2026-58630 vulnerability is caused by improper access control in Azure App Service For Linux, allowing unauthorized attackers to elevate privileges over a network. The vulnerability has a CVSS score of 10 and is classified as CWE-284. The affected product is Azure App Service For Linux. Security teams should review and apply the vendor advisory from Microsoft and implement compensating controls to limit network access to sensitive resources.

Defensive priority

Critical vulnerability in Azure App Service For Linux allows unauthorized attackers to elevate privileges over a network.

Recommended defensive actions

  • Review and apply the vendor advisory from Microsoft
  • Inventory and assess Azure App Service For Linux deployments for potential exposure
  • Implement compensating controls to limit network access to sensitive resources
  • Monitor for suspicious activity and exception tracking
  • Review relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE-2026-58630 record indicates a critical vulnerability in Azure App Service For Linux with a CVSS score of 10. The vulnerability is due to improper access control, allowing unauthorized attackers to elevate privileges over a network. The NVD entry is currently Analyzed. The evidence is limited, and defenders should verify the affected scope and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-58630 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-58630

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

  • CVE-2026-58630 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-58630

    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.