go-openapi swag up to 0.27.0 JSON Parsing stack-based overflow

Summaryinfo

A vulnerability classified as problematic has been found in go-openapi swag up to 0.27.0. The impacted element is an unknown function of the component JSON Parsing. The manipulation leads to stack-based overflow. This vulnerability is referenced as CVE-2026-93450. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in go-openapi swag up to 0.27.0. This issue affects some unknown processing of the component JSON Parsing. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is availability. The summary by CVE is:

go-openapi/swag jsonutils before 0.27.1 contains a stack overflow vulnerability in ordered JSON parsing and serialization due to unbounded recursion with no depth limit. Remote unauthenticated attackers can submit deeply nested JSON documents to services accepting OpenAPI specifications, causing fatal stack overflow that terminates the process and all in-flight requests.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-93450 since 09/18/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 0.27.1 eliminates this vulnerability.

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Productinfo

Vendor

• go-openapi

Name

• swag

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27.0

Website

• Product: https://github.com/go-openapi/swag/

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