Vulnerability in github.com/getkin/kin-openapi (CVE-2026-77354)
Summary
Vulnerability in github.com/getkin/kin-openapi (CVE-2026-77354). Risk of unauthorized operations or information disclosure. Exploitable via GET /whatever. Mitigation: upgrade to 0.142.0 or later.
Original description
The description as published by the source.
kin-openapi has uncontrolled resource consumption in openapi3filter deepObject query parameter decoding in github.com/getkin/kin-openapi
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-77354 has been found in github.com/getkin/kin-openapi.
Attackers can target a specific entry point like GET /whatever over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade github.com/getkin/kin-openapi to 0.142.0 or later.
If unsure, ask your IT team or search "github.com/getkin/kin-openapi CVE-2026-77354" on the vendor's site.
CVE-2026-77354 (github.com/getkin/kin-openapi) — CWE-400
Attack surface: GET /whatever / openapi3filter / deepObject / maxItems
Patched: 0.142.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-400) exists in github.com/getkin/kin-openapi. Attackers reach the vulnerable code path via GET /whatever.
Check the vendor advisory for the affected versions of github.com/getkin/kin-openapi. Attack surface: GET /whatever / openapi3filter / deepObject / maxItems.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 0.142.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual GET /whatever requests with malformed payloads or SQL meta-characters. Run grep -r 'github.com/getkin/kin-openapi' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/getkin/kin-openapi' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/getkin/kin-openapiを grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'GET /whatever' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
GET /whateverへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Apply patch patch
Upgrade github.com/getkin/kin-openapi to 0.142.0ステージング環境で 0.142.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 2 で見つけた異常検知の続報チェックを含めること。
-
4Post-deployment verification verify
Replay attack against GET /whatever on staging to confirm patch closes the vectorパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 2 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-77354 golang-github-getkin-kin-openapi
- Ubuntu UBUNTU-CVE-2026-77354 golang-github-getkin-kin-openapi
References
- advisory github.com
- patch github.com
- web github.com
- web github.com
- web security-advisories@github.com