CVE-2026-58630: Improper access control in Azure App Service allows an unauthorized attacker to elevate privileges over a netw

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CRITICAL 10.0REMOTEWATCHLISTMITIGATE

CVE-2026-58630 is a critical-severity flaw (CVSS 10.0) affecting azure app service for linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper access control in Azure App Service allows an unauthorized attacker to elevate privileges over a network.

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 42%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-07-24
Last modified	2026-10-24

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-24 15:18 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

microsoft azure app service for linux MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy azure-app-service-for-linux || rpm -q azure-app-service-for-linux || azure-app-service-for-linux --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-58630?

azure app service for linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-58630 being exploited?

CVE-2026-58630 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-58630 affect?

CVE-2026-58630 affects azure app service for linux. Severity is critical (CVSS 10.0). Improper access control in Azure App Service allows an unauthorized attacker to elevate privileges over a network.

How urgent is CVE-2026-58630?

Priority 63/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Azure vulnerabilities

References

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