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CVE-2026-54451
Vulnerability in protobuf (CVE-2026-54451)
Summary
vulnerability in protobuf (CVE-2026-54451). Risk of unauthorized operations or information disclosure. Exploitable via ``Protobuf.Decoder``. Mitigation: upgrade to `0.16.1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-54451** has been found in protobuf.
Attackers can target a specific entry point like ``Protobuf.Decoder`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: upgrade protobuf to **0.16.1** or later.
If unsure, ask your IT team or search "protobuf CVE-2026-54451" on the vendor's site.
CVE-2026-54451 (protobuf) — CWE-674 /
Attack surface: `Protobuf.Decoder` / `protobuf` / `decode` / `Protobuf.DecodeError`
Patched: `0.16.1` — 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
**A vulnerability** (CWE-674) exists in protobuf. Attackers reach the vulnerable code path via ``Protobuf.Decoder`` without authentication.
📍 Affected scope
protobuf — . Attack surface: `Protobuf.Decoder` / `protobuf` / `decode` / `Protobuf.DecodeError`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **0.16.1**.
🛡️ 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 'protobuf' .` 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 'protobuf' . | 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 `protobuf` 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 protobuf to 0.16.1ステージング環境で 0.16.1 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
erlang
protobuf
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.16.1"}]}]
References
- web https://github.com/elixir-protobuf/protobuf/security/advisories/GHSA-rv48-qqj5-crxg
- web https://github.com/elixir-protobuf/protobuf/commit/21ec7c5bec4fec74e10c1de0d5d1a2d8152ac5d4
- web https://github.com/elixir-protobuf/protobuf/commit/b8efa97790eece3d2d0e8e7c31a45ed409fe5338
- web https://github.com/advisories/GHSA-rv48-qqj5-crxg