CVE-2026-93450
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.9%
58.5th percentile
CISA KEV
Not listed
Weakness / dates
CWE-674
Published 2026-09-18 · modified 2026-09-22
Description
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.
References
- https://github.com/go-openapi/swag
- https://github.com/go-openapi/swag/blob/v0.27.0/jsonutils/adapters/stdlib/json/adapter.go#L68
- https://github.com/go-openapi/swag/blob/v0.27.0/jsonutils/adapters/stdlib/json/ordered_map.go#L214
- https://github.com/go-openapi/swag/commit/0c24346ced59a25811e8694a915e7131d25ccb0e
- https://github.com/go-openapi/swag/security/advisories/GHSA-xh24-9qpg-8w28
- https://www.vulncheck.com/advisories/go-openapi-swag-jsonutils-before-0.27.1-uncontrolled-recursion-in-ordered-json-marshal-and-unmarshal
- https://github.com/go-openapi/swag/security/advisories/GHSA-xh24-9qpg-8w28