SB2026082836 - Multiple vulnerabilities in kin-openapi

Description

This security bulletin contains information about 2 vulnerabilities.

1) Uncontrolled Recursion (CVE-ID: N/A)

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled recursion in runtime request and response validation handlers when processing circular allOf/anyOf/oneOf schema references. A remote attacker can send a request or supply a crafted schema to trigger a fatal process crash and cause a denial of service.

The issue results in an unrecoverable Go stack overflow that terminates the entire process, including unrelated goroutines.

2) NULL pointer dereference (CVE-ID: N/A)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to null pointer dereference in openapi3filter request validation when processing crafted OpenAPI 3.1 array parameters or URL-encoded body data with a schema that omits the items keyword. A remote attacker can send a specially crafted request to cause a denial of service.

The issue is triggered by query parameters, deepObject query parameters, or URL-encoded request bodies that reach unguarded array decoding paths.

Remediation

Install update from vendor's website.

References

• https://github.com/getkin/kin-openapi/security/advisories/GHSA-g8cf-rcjf-c8cf
• https://github.com/getkin/kin-openapi/security/advisories/GHSA-vrcc-3ch7-hppw