CVE-2026-44294 describes a Denial of Service (DoS) vulnerability affecting protobufjs versions 7.5.5 and earlier. An attacker can exploit this by providing a malicious protobuf schema or JSON descriptor, leading to runtime code generation errors and rendering affected message types unusable. The vulnerability was published on May 12, 2026, and mitigation strategies focus on schema validation and upgrading to a patched version.
影響と攻撃シナリオ翻訳中…
The primary impact of CVE-2026-44294 is a denial of service. Successful exploitation prevents the use of specific protobuf message types within applications utilizing protobufjs. This can disrupt critical functionality relying on these message formats, potentially leading to application crashes or service unavailability. The attack vector involves injecting malicious control characters into protobuf field names, which are then embedded into generated JavaScript code. This triggers syntax errors during runtime code generation, effectively disabling the message type. While the vulnerability doesn't directly expose sensitive data, the disruption of service can have significant operational consequences.
悪用の状況翻訳中…
CVE-2026-44294 is currently not listed on KEV or EPSS. The CVSS score is 5.3 (Medium), indicating a moderate probability of exploitation. No public Proof-of-Concept (PoC) code has been publicly released as of the publication date. Active campaigns targeting this vulnerability are not currently known, but the ease of schema manipulation suggests potential for future exploitation.
脅威インテリジェンス
エクスプロイト状況
CVSS ベクトル
これらのメトリクスの意味は？
- Attack Vector
- ネットワーク — インターネット経由でリモートから悪用可能。物理・ローカルアクセス不要。
- Attack Complexity
- 低 — 特別な条件不要。安定して悪用可能。
- Privileges Required
- なし — 認証不要。資格情報なしで悪用可能。
- User Interaction
- なし — 自動かつ無音の攻撃。被害者は何もしない。
- Scope
- 変化なし — 影響は脆弱なコンポーネントのみ。
- Confidentiality
- なし — 機密性への影響なし。
- Integrity
- なし — 完全性への影響なし。
- Availability
- 低 — 部分的または断続的なサービス拒否。
影響を受けるソフトウェア
弱点分類 (CWE)
タイムライン
- 公開日
緩和策と回避策翻訳中…
The recommended mitigation for CVE-2026-44294 is to upgrade to a patched version of protobufjs. Unfortunately, a fixed version is not yet available. As a workaround, implement strict input validation on any protobuf schemas or JSON descriptors received from untrusted sources. This validation should specifically filter out or escape control characters that could be exploited. Consider using a Web Application Firewall (WAF) to inspect and block malicious protobuf payloads. Thoroughly review and sanitize any external data used to construct protobuf messages.
修正方法翻訳中…
公式パッチはありません。回避策を確認するか、アップデートを監視してください。
よくある質問翻訳中…
What is CVE-2026-44294 — DoS in protobufjs ≤7.5.5?
CVE-2026-44294 is a Denial of Service vulnerability in protobufjs versions up to 7.5.5. A malicious protobuf schema can cause runtime code generation to fail, rendering message types unusable.
Am I affected by CVE-2026-44294 in protobufjs?
If you are using protobufjs version 7.5.5 or earlier and process protobuf schemas from untrusted sources, you are potentially affected by this vulnerability.
How do I fix CVE-2026-44294 in protobufjs?
A patched version is not yet available. Implement strict input validation on protobuf schemas and consider using a WAF to block malicious payloads.
Is CVE-2026-44294 being actively exploited?
As of the publication date, there are no known active campaigns exploiting CVE-2026-44294, but the vulnerability's nature suggests potential for future exploitation.
Where can I find the official protobufjs advisory for CVE-2026-44294?
Refer to the protobufjs project's official website and GitHub repository for updates and advisories related to CVE-2026-44294.
今すぐ試す — アカウント不要
Upload any manifest (composer.lock, package-lock.json, WordPress plugin list…) or paste your component list. You get a vulnerability report instantly. Uploading a file is just the start: with an account you get continuous monitoring, Slack/email alerts, multi-project and white-label reports.
依存関係ファイルをドラッグ＆ドロップ
composer.lock、package-lock.json、requirements.txt、Gemfile.lock、pubspec.lock、Dockerfile...