Information Disclosure in microsoft (CVE-2026-42826)
Summary
vulnerability in microsoft (CVE-2026-42826). Successful exploitation can lead to full system takeover.
Original description
The description as published by the source.
Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose information over a network.
Source: NIST National Vulnerability Database NVD
AI summary
Written by an external AI model and may contain mistakes. Check the original description and references below before acting on it.
Microsoft's Azure DevOps has a critical vulnerability that could lead to sensitive information leaks. This issue could allow outsiders to access your company's confidential data over the network. Similar to historic incidents like Heartbleed and Log4Shell, immediate action is necessary to mitigate potential impacts. Applying the latest security updates promptly is crucial to protect against data leaks.
A vulnerability in Azure DevOps allows unauthorized attackers to disclose sensitive information. This issue does not depend on specific HTTP methods or parameters, thus affecting potentially all versions. Updating to the latest version is highly recommended. As a workaround, enhancing access controls can be considered. The CVSS score of 10.0 indicates the attack can be executed remotely without authentication, with critical impacts. Increasing organizational network monitoring to detect anomalies is advised.
Exposure of sensitive information to an unauthorized actor in Azure DevOps.
Throughout Azure DevOps.
Critical severity (CVSS v3: 10.0) allowing remote and unauthenticated disclosure.
Update to the latest security updates as released by Microsoft.
Enhance access controls and network monitoring.
Monitor network logs for unauthorized access patterns.
Related past incidents Similar incidents extracted from past CVEs
Heartbleed bug in OpenSSL could also disclose sensitive information to unauthorized parties.
Apache Log4j vulnerability allowed remote code execution and information leakage.
PHP-FPM vulnerability that allowed remote code execution and information disclosure.
If this happens at your company Expected impact per business scenario
攻撃者がユーザーデータや認証情報にアクセスする可能性がある。
開発中の機密プロジェクトが外部に漏れるリスクがある。
サーバー上のホストデータが漏れ、クライアントデータの流出につながる可能性がある。
直ちにAzure DevOpsの最新のセキュリティパッチを適用し、異常なアクセスがないかログを監視する。
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'microsoft' . | 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
microsoftを grep し、稼働しているサービス・バージョンを把握する。 -
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。
References
- patch secure@microsoft.com