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CVE-2026-100347— kin-openapi: Unauthenticated panic (DoS) in openapi3filter legacy router via non-canonical/unsupported HTTP method on a static 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。在版本 0.145.0 之前， 使用了 路由器，该路由器会将不支持或非标准的 HTTP 方法（针对某个已存在的静态路径）传递给 。 的默认分支在身份验证执行之前就会引发 panic（程序崩溃），因此，未经身份验证的远程攻击者可以反复发送诸如 或大小写异常的 等请求，导致连接中断并引发栈追踪日志持续增长。该 panic 的触发需要精确匹配一个静态路径；而仅通过模板化路由匹配到的具体路径不会到达相同的 panic 触发点。此问题已在版本 0.1

CVSS 5.3 · Medium EPSS 0.52% · P43

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
getkin kin-openapi < 0.145.0 affected
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I. Basic Information for CVE-2026-100347

Vulnerability Information
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Vulnerability Title
kin-openapi: Unauthenticated panic (DoS) in openapi3filter legacy router via non-canonical/unsupported HTTP method on a static path
Source: CVE Program / CVE List V5
Vulnerability Description
kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3filter.ValidationHandler uses the routers/legacy router, which passes an unsupported or non-canonical HTTP method for an existing static path to openapi3.PathItem.GetOperation. The default branch of GetOperation panics before authentication runs, so an unauthenticated remote client can repeatedly send methods such as PROPFIND or lowercase get to abort connections and generate stack-trace log growth. The specific panic requires an exact static path; a concrete path matched only by a templated route does not reach the same sink. This issue is fixed in version 0.145.0.
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:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
getkin kin-openapi < 0.145.0 -

II. Public POCs for CVE-2026-100347

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III. Intelligence Information for CVE-2026-100347

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Patches & Fixes for CVE-2026-100347 (1)

Vendor Advisories for CVE-2026-100347 (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-2026-100352 7.5 HIGH kin-openapi: YAML NaN/Inf Values Bypass Built-in Guards and Panic via OAS 3.1 Validation P
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

IV. Related Vulnerabilities

Same product: kin-openapi
Same vendor: getkin
Same weakness: CWE-20

V. Comments for CVE-2026-100347

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