CVE-2026-100354

kin-openapi is a Go project for handling OpenAPI files. Prior to 0.149.0, runtime request, response, and direct schema validation lacks cycle detection when an allOf, anyOf, or oneOf chain refers back to an ancestor schema, even though loading and document validation accept the circular reference. A request or response that reaches the affected schema causes unbounded recursion in Schema.visitJSON or openapi3filter.decodeValue and exhausts the Go goroutine stack. The resulting fatal stack overflow cannot be caught with recover and terminates the entire process, including unrelated requests. This issue is fixed in version 0.149.0.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-25)

CWE

CWE-674

Published

2026-10-15

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Packages (OSV)

References

• https://github.com/getkin/kin-openapi/commit/9245cef66c840e27a08409a8a5cd0ee930c5bcff
• https://github.com/getkin/kin-openapi/releases/tag/v0.149.0
• https://github.com/getkin/kin-openapi/security/advisories/GHSA-g8cf-rcjf-c8cf
• https://github.com/getkin/kin-openapi/security/advisories/GHSA-g8cf-rcjf-c8cf

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