<p>An elevation of privilege vulnerability exists in the way Azure Functions validate access keys.</p>
<p>An unauthenticated attacker who successfully exploited this vulnerability could invoke an HTTP Function without proper authorization.</p>
<p>This security update addresses the vulnerability by correctly validating access keys used to access HTTP Functions.</p>
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionNone
Threat
Exploit MaturityPoC
Vulnerable System
ConfidentialityLow
IntegrityNone
AvailabilityNone
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 2.9 → 2.9 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 2.9 |
Affected Software
| Vendor | Product | Version |
|---|
| Microsoft | Azure Functions | N/A |
| microsoft | azure_functions | All versions |
Published: 2020-10-16
