CVE-2026-93450: Uncontrolled Recursion in go-openapi swag
CVE-2026-93450 is a high-severity stack overflow vulnerability in the go-openapi swag jsonutils component before version 0.27.1. It arises from unbounded recursion during ordered JSON parsing and serialization, allowing remote unauthenticated attackers to cause a fatal stack overflow by submitting deeply nested JSON documents. This results in process termination and disruption of all in-flight requests.
AI Analysis
Technical Summary
The vulnerability in go-openapi/swag jsonutils prior to version 0.27.1 is due to uncontrolled recursion without a depth limit in ordered JSON parsing and serialization. Remote attackers can exploit this by sending deeply nested JSON payloads to services using OpenAPI specifications, triggering a stack overflow that crashes the process. The CVSS 4.0 score is 8.7, indicating high severity with network attack vector, no privileges or user interaction required, and high impact on availability.
Potential Impact
Exploitation leads to a fatal stack overflow causing the termination of the affected process and disruption of all ongoing requests. This can result in denial of service for applications using vulnerable versions of go-openapi swag jsonutils.
Mitigation Recommendations
Upgrade to go-openapi swag jsonutils version 0.27.1 or later where this vulnerability is fixed. Since the vulnerability is fixed in 0.27.1, applying this official patch eliminates the risk.
CVE-2026-93450: Uncontrolled Recursion in go-openapi swag
Description
CVE-2026-93450 is a high-severity stack overflow vulnerability in the go-openapi swag jsonutils component before version 0.27.1. It arises from unbounded recursion during ordered JSON parsing and serialization, allowing remote unauthenticated attackers to cause a fatal stack overflow by submitting deeply nested JSON documents. This results in process termination and disruption of all in-flight requests.
CVSS v4.0
Score 8.7high
Affected software
go-openapi
swag
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in go-openapi/swag jsonutils prior to version 0.27.1 is due to uncontrolled recursion without a depth limit in ordered JSON parsing and serialization. Remote attackers can exploit this by sending deeply nested JSON payloads to services using OpenAPI specifications, triggering a stack overflow that crashes the process. The CVSS 4.0 score is 8.7, indicating high severity with network attack vector, no privileges or user interaction required, and high impact on availability.
Potential Impact
Exploitation leads to a fatal stack overflow causing the termination of the affected process and disruption of all ongoing requests. This can result in denial of service for applications using vulnerable versions of go-openapi swag jsonutils.
Mitigation Recommendations
Upgrade to go-openapi swag jsonutils version 0.27.1 or later where this vulnerability is fixed. Since the vulnerability is fixed in 0.27.1, applying this official patch eliminates the risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-17T22:45:30.211Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aac788555bf5e2cf5129613
Added to database: 09/17/2026, 23:32:21 UTC
Last enriched: 09/17/2026, 23:46:39 UTC
Last updated: 09/17/2026, 23:46:39 UTC
Views: 5
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