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CVE-2026-30246
Information Disclosure in github.com/gofiber/fiber/v3 (CVE-2026-30246)
Summary
vulnerability in github.com/gofiber/fiber/v3 (CVE-2026-30246). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `3.2.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-30246** has been found in github.com/gofiber/fiber/v3.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade github.com/gofiber/fiber/v3 to **3.2.0** or later.
If unsure, ask your IT team or search "github.com/gofiber/fiber/v3 CVE-2026-30246" on the vendor's site.
CVE-2026-30246 (github.com/gofiber/fiber/v3) — CWE-200 /
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: `3.2.0` — 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.
❓ What is the problem
**information disclosure** (CWE-200) exists in github.com/gofiber/fiber/v3.
📍 Affected scope
github.com/gofiber/fiber/v3 — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **3.2.0**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'github.com/gofiber/fiber/v3' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'github.com/gofiber/fiber/v3' . | 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/gofiber/fiber/v3` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade github.com/gofiber/fiber/v3 to 3.2.0ステージング環境で 3.2.0 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 3 で見つけた異常検知の続報チェックを含めること。
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7Post-deployment verification verify
Confirm patched version is live in production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 3 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
go
github.com/gofiber/fiber/v3
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.2.0"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-30246
- package https://github.com/gofiber/fiber
- web https://github.com/gofiber/fiber/security/advisories/GHSA-35hp-hqmv-8qg8
- web https://github.com/gofiber/fiber/commit/050ff1ff18511c1475b8ec627460216aaecddd4e
- web https://github.com/gofiber/fiber/commit/9a0d12c07ed895b84c72987f9288b04137afe5de
- web https://github.com/gofiber/fiber/blob/main/middleware/cache/cache_test.go#L599-L621
- web https://github.com/gofiber/fiber/blob/main/middleware/cache/config.go#L90-L92
- web https://github.com/advisories/GHSA-35hp-hqmv-8qg8