CVE-2026-65816: Use of incorrectly-resolved name or reference in Azure Arc allows an unauthorized attacker to elevate privileg

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CRITICAL 10.0REMOTEWATCHLISTMITIGATE

CVE-2026-65816 is a critical-severity flaw (CVSS 10.0) affecting azure web apps. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use of incorrectly-resolved name or reference in Azure Arc 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	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-706
Published	2026-08-20
Last modified	2026-10-18

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-20 22:17 UTCPublished CVE record published
2026-10-18 20:10 UTCUpdated Record last modified

microsoft azure web apps 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-web-apps || rpm -q azure-web-apps || azure-web-apps --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 · ruff · FIXED · 0.17.3-1.fc46 · FEDORA-2026-63898fdcbb · source

sudo dnf upgrade --advisory=FEDORA-2026-63898fdcbb

Fedora ELN · xorg-x11-server-Xwayland · FIXED · 26.0.99.903-2.eln159 · FEDORA-2026-4581dab0ed · source

sudo dnf upgrade --advisory=FEDORA-2026-4581dab0ed

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-2026-65816?

azure web apps: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-65816 being exploited?

CVE-2026-65816 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-2026-65816 affect?

CVE-2026-65816 affects azure web apps. Severity is critical (CVSS 10.0). Use of incorrectly-resolved name or reference in Azure Arc allows an unauthorized attacker to elevate privileges over a network.

How urgent is CVE-2026-65816?

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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