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CVE-2026-100349— kin-openapi openapi3filter: nil-pointer panic in ValidateResponse on a response header declared with content

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 语言项目。在版本 0.146.0 之前，当 OpenAPI 文档以“content”（而非“schema”）方式声明响应头时， 函数在调用 时会传入一个 nil 的响应头 schema。尽管该文档仍能通过验证，但对受影响操作的所有响应验证都会在尝试解引用该 nil schema 时引发恐慌（panic），即使响应中并未包含所声明的头部字段。 对于处理不受信任的 OpenAPI 规范的应用程序，此漏洞可能导致远程可用性影响（如拒绝服务）；而对于仅使

CVSS 8.2 · High EPSS 0.37% · P29

Affected Version Matrix 1

VendorProduct Version RangeStatus
getkin kin-openapi < 0.146.0 affected
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I. Basic Information for CVE-2026-100349

Vulnerability Information
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Vulnerability Title
kin-openapi openapi3filter: nil-pointer panic in ValidateResponse on a response header declared with content
Source: CVE Program / CVE List V5
Vulnerability Description
kin-openapi is a Go project for handling OpenAPI files. Prior to 0.146.0, openapi3filter.ValidateResponse passes a nil response header schema to decodeValue when an OpenAPI document declares the header with content instead of schema. The document passes validation, but every response validation for the affected operation dereferences the nil schema and panics even when the response does not contain the declared header. Applications that ingest an untrusted specification can expose this as remote availability impact, while applications using only trusted local specifications still crash when the affected operation is exercised. This issue is fixed in version 0.146.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
getkin kin-openapi < 0.146.0 -

II. Public POCs for CVE-2026-100349

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III. Intelligence Information for CVE-2026-100349

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Patches & Fixes for CVE-2026-100349 (1)

Vendor Advisories for CVE-2026-100349 (1)

Vendor Pages for CVE-2026-100349 (1)

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

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
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-476

V. Comments for CVE-2026-100349

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