Azure SDK for Python Remote Code Execution Vulnerability
Priority MEDIUM 54CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from Microsoft.
Summary
Deserialization of untrusted data in Azure SDK allows an unauthorized attacker to execute code over a network.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02542 85th percentileScored 2026-11-07
Fix Fixed Azure AI Language Authoring (Microsoft): 1.0.0b4azure-ai-language-conversations-authoring (PyPI): 1.0.0b4
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Azure AI Language Authoring | 1.0.0 to before 1.0.0b4 | 1.0.0b4 | Patch available | CNA |
| — | azure-ai-language-conversations-authoring (PyPI) | before 1.0.0b4 | 1.0.0b4 | Patch available | GHSA-436v-jg82-p533 |
- Azure AI Language Authoring VendorMicrosoft Affected 1.0.0 to before 1.0.0b4 Fixed in 1.0.0b4 Patch available CNA
- azure-ai-language-conversations-authoring (PyPI) Vendor— Affected before 1.0.0b4 Fixed in 1.0.0b4 Patch available GHSA-436v-jg82-p533
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:azure_conversation_authoring_client_library:1.0.0:beta1:*:*:*:python:*:* | 1.0.0 beta1 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:azure_conversation_authoring_client_library:1.0.0:beta2:*:*:*:python:*:* | 1.0.0 beta2 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:azure_conversation_authoring_client_library:1.0.0:beta3:*:*:*:python:*:* | 1.0.0 beta3 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:azure_conversation_authoring_client_library:1.0.0:beta1:*:*:*:python:*:* Versions 1.0.0 beta1 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:azure_conversation_authoring_client_library:1.0.0:beta2:*:*:*:python:*:* Versions 1.0.0 beta2 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:azure_conversation_authoring_client_library:1.0.0:beta3:*:*:*:python:*:* Versions 1.0.0 beta3 Vulnerable ·Microsoft
Remediation
- Fix · CNA Azure AI Language Authoring (Microsoft) Fixed in 1.0.0b4
- Fix · GHSA-436v-jg82-p533 azure-ai-language-conversations-authoring (PyPI) Fixed in 1.0.0b4 Advisory →
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Remote Code Execution
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Less Likely
| Product | Status | Plan or fix |
|---|---|---|
| Azure AI Language Authoring | Fixed | 1.0.0b4 · Security Update |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-21531
- 2026-10-03 Alias added: GHSA-436v-jg82-p533
References
Sources
- CVE-2026-21531 · CVE Program
- CVE-2026-21531 · NVD
- FIRST EPSS
- GHSA-436v-jg82-p533 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-21531 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences