CVE-2026-77900 json
Azure App Service Remote Code Execution Vulnerability
published 2026-10-08 31 d ago modified 2026-10-31 8 d ago also EUVD-2026-95394
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
Missing authentication for critical function in Azure App Service allows an unauthorized attacker to execute code over a network.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 31 d ago
Exploit prediction
0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Azure App Service for Linux
Classification
- Weakness
-
- CWE-306 Missing Authentication for Critical Functionality
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-77900
vendor-advisory, patch
Sources
- CVE List CVE-2026-77900
- NVD CVE-2026-77900
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.