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CVE-2026-100352— kin-openapi: YAML NaN/Inf Values Bypass Built-in Guards and Panic via OAS 3.1 Validation Path

Quick assessment

Affected
getkin kin-openapi
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

kin-openapi 是一个用于处理 OpenAPI 文件的 Go 项目。在 0.148.0 版本之前，OpenAPI 3.1 的验证路径会将 YAML 中的 NaN（非数字）和无穷大（infinity）数值直接传递给 santhosh-tekuri/jsonschema v6.0.2，而未应用 kin-openapi 已有的有限数值保护机制。远程未认证攻击者可以向具有数值约束的操作发送包含 、 或 的 或 格式请求体，从而在 ValidateRequest 过程中导致该依赖库创建并解引用一个 nil 的 big

CVSS 7.5 · High EPSS 0.43% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
getkin kin-openapi < 0.148.0 affected
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I. Basic Information for CVE-2026-100352

Vulnerability Information
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Vulnerability Title
kin-openapi: YAML NaN/Inf Values Bypass Built-in Guards and Panic via OAS 3.1 Validation Path
Source: CVE Program / CVE List V5
Vulnerability Description
kin-openapi is a Go project for handling OpenAPI files. Prior to 0.148.0, the OpenAPI 3.1 validation path passes YAML NaN and infinity numeric values to santhosh-tekuri/jsonschema v6.0.2 without applying kin-openapi's existing finite-number guards. A remote unauthenticated client can send an application/yaml or application/x-yaml request body containing .nan, .inf, or -.inf to an operation with a numeric constraint, causing the dependency to create and dereference a nil big.Rat during ValidateRequest. Standard net/http servers recover the panic per connection, while other hosts or application goroutines may terminate the process. This issue is fixed in version 0.148.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对因果或异常条件的不恰当检查
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
getkin kin-openapi < 0.148.0 -

II. Public POCs for CVE-2026-100352

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III. Intelligence Information for CVE-2026-100352

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Patches & Fixes for CVE-2026-100352 (2)

Vendor Advisories for CVE-2026-100352 (1)

Same Patch Batch · getkin · 2026-10-15 · 9 CVEs total

CVE-2026-100349 8.2 HIGH kin-openapi openapi3filter: nil-pointer panic in ValidateResponse on a response header dec
CVE-2026-97394 7.5 HIGH kin-openapi: Nil-pointer dereference panic in openapi3filter for OpenAPI 3.1 array schemas
CVE-2026-100353 7.5 HIGH kin-openapi: Incomplete Fix for GHSA-p6wj-qrr4-pgh5: Three Unpatched nil-Items Panic Paths
CVE-2026-100354 7.5 HIGH kin-openapi: Uncontrolled Recursion on Circular allOf/anyOf/oneOf Schemas Causes Fatal Pro
CVE-2026-100351 7.4 HIGH kin-openapi: ValidationHandler security-requirement bypass via encoded-path operation conf
CVE-2026-100348 5.3 MEDIUM kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointe
CVE-2026-100350 5.3 MEDIUM kin-openapi deepObject query decoding repeatedly compiles an invariant regular expression
CVE-2026-100347 5.3 MEDIUM kin-openapi: Unauthenticated panic (DoS) in openapi3filter legacy router via non-canonical

IV. Related Vulnerabilities

Same product: kin-openapi
Same vendor: getkin
Same weakness: CWE-754

V. Comments for CVE-2026-100352

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