CVE-2026-100354kin-openapi: Uncontrolled Recursion on Circular allOf/anyOf/oneOf Schemas Causes Fatal Process Crash
Updated under an hour ago ()
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It affects getkin kin-openapi. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.43%, higher than 36% of scored CVEs.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-674
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.43% (percentile 36)
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
getkin kin-openapi getkin:kin_openapi (from the name) | before 0.149.0 | CNA record |
References
- https://github.com/getkin/kin-openapi/security/advisories/GHSA-g8cf-rcjf-c8cfx-refsource-confirm
- https://github.com/getkin/kin-openapi/commit/9245cef66c840e27a08409a8a5cd0ee930c5bcffx-refsource-misc
- https://github.com/getkin/kin-openapi/releases/tag/v0.149.0x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.