CVE-2026-77900
Azure App Service Remote Code Execution Vulnerability
Microsoft Azure App Service for LinuxContainers & cloud
CVSS
9.8CriticalExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.49%Chance of exploitation activity in the next 30 days, higher than 41% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
Description
Missing authentication for critical function in Azure App Service allows an unauthorized attacker to execute code over a network.
Text from CVE List
Affected versions 1
- Azure App Service for Linuxaffected: -CVE List