CVE-2026-48817: CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') in Kludex starlette
Starlette versions prior to 1.1.0 have a vulnerability in the HTTPEndpoint dispatch mechanism where unsafe reflection is used to select request handlers. This allows non-standard HTTP methods to invoke internal methods not intended as handlers if the subclass does not explicitly restrict HTTP methods, potentially bypassing authorization. The issue is fixed in version 1.1.0.
AI Analysis
Technical Summary
CVE-2026-48817 describes a vulnerability in Kludex starlette prior to version 1.1.0 where the HTTPEndpoint dispatch mechanism uses unsafe reflection to select request handlers. If an HTTPEndpoint subclass is registered without explicitly restricting HTTP methods, attackers can use non-standard HTTP methods to invoke internal methods not intended as handlers, potentially bypassing authorization controls. This vulnerability is categorized under CWE-470 (Use of Externally-Controlled Input to Select Classes or Code, 'Unsafe Reflection'). The vulnerability has a CVSS 3.1 base score of 5.3 (medium severity). The issue is fixed in starlette version 1.1.0.
Potential Impact
The vulnerability allows unauthorized invocation of internal methods via non-standard HTTP methods, potentially bypassing authorization mechanisms. There is no direct confidentiality or availability impact reported. The integrity impact is limited to unauthorized method invocation within the application context.
Mitigation Recommendations
Upgrade starlette to version 1.1.0 or later, where this vulnerability is fixed. Since the vendor advisory does not provide additional remediation details, applying the official fix is the recommended action. Patch status is confirmed fixed in version 1.1.0.
CVE-2026-48817: CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') in Kludex starlette
Description
Starlette versions prior to 1.1.0 have a vulnerability in the HTTPEndpoint dispatch mechanism where unsafe reflection is used to select request handlers. This allows non-standard HTTP methods to invoke internal methods not intended as handlers if the subclass does not explicitly restrict HTTP methods, potentially bypassing authorization. The issue is fixed in version 1.1.0.
CVSS v3.1
Score 5.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-48817 describes a vulnerability in Kludex starlette prior to version 1.1.0 where the HTTPEndpoint dispatch mechanism uses unsafe reflection to select request handlers. If an HTTPEndpoint subclass is registered without explicitly restricting HTTP methods, attackers can use non-standard HTTP methods to invoke internal methods not intended as handlers, potentially bypassing authorization controls. This vulnerability is categorized under CWE-470 (Use of Externally-Controlled Input to Select Classes or Code, 'Unsafe Reflection'). The vulnerability has a CVSS 3.1 base score of 5.3 (medium severity). The issue is fixed in starlette version 1.1.0.
Potential Impact
The vulnerability allows unauthorized invocation of internal methods via non-standard HTTP methods, potentially bypassing authorization mechanisms. There is no direct confidentiality or availability impact reported. The integrity impact is limited to unauthorized method invocation within the application context.
Mitigation Recommendations
Upgrade starlette to version 1.1.0 or later, where this vulnerability is fixed. Since the vendor advisory does not provide additional remediation details, applying the official fix is the recommended action. Patch status is confirmed fixed in version 1.1.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-22T20:57:10.976Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a33019af198dc38c1fe1944
Added to database: 06/17/2026, 20:20:42 UTC
Last enriched: 07/10/2026, 09:52:13 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 95
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