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CVE-2026-4524: Authentication Bypass in GitLab
プラットフォーム
gitlab
コンポーネント
gitlab
修正版
18.11.3
CVE-2026-4524 describes an authentication bypass vulnerability discovered in GitLab Community Edition (CE) and Enterprise Edition (EE). This flaw allows authenticated users to circumvent authorization checks and gain unauthorized access to confidential issue content within public projects. The vulnerability impacts versions 18.9.1 through 18.11.3 and has been resolved in version 18.11.3.
影響と攻撃シナリオ翻訳中…
Successful exploitation of CVE-2026-4524 could lead to unauthorized disclosure of sensitive information contained within GitLab issues. Attackers could potentially access confidential project details, internal discussions, or proprietary data that should only be visible to authorized personnel. While the vulnerability requires authentication, the ease of bypassing authorization checks significantly expands the potential attack surface. This could result in data breaches, reputational damage, and potential legal ramifications for organizations relying on GitLab for project management and collaboration.
悪用の状況翻訳中…
CVE-2026-4524 was published on May 14, 2026. As of this date, there are no publicly known active campaigns exploiting this vulnerability. The vulnerability is not currently listed on KEV (Known Exploited Vulnerabilities). The EPSS (Exploit Prediction Scoring System) score is pending evaluation, indicating an unknown probability of exploitation. Monitor security advisories and threat intelligence feeds for any updates regarding exploitation attempts.
脅威インテリジェンス
エクスプロイト状況
CISA SSVC
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
- 低 — 有効なユーザーアカウントがあれば十分。
- 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
- 高 — 機密性の完全喪失。全データが読み取り可能。
- Integrity
- なし — 完全性への影響なし。
- Availability
- なし — 可用性への影響なし。
影響を受けるソフトウェア
弱点分類 (CWE)
タイムライン
- 予約済み
- 公開日
緩和策と回避策翻訳中…
The primary mitigation for CVE-2026-4524 is to immediately upgrade GitLab instances to version 18.11.3 or later. If upgrading is not immediately feasible, consider implementing stricter access controls within GitLab to limit the potential impact of unauthorized access. Review project permissions and ensure that only authorized users have access to sensitive issue content. While a WAF or proxy cannot directly prevent this bypass, it could potentially be configured to flag suspicious access patterns to confidential issue data. After upgrading, confirm the fix by attempting to access confidential issue content in a public project with a standard user account; access should be denied.
修正方法翻訳中…
Actualice GitLab a la versión 18.9.7 o superior, 18.10.6 o superior, o 18.11.3 o superior para mitigar la vulnerabilidad. Esta actualización corrige una falla de autorización que permitía el acceso no autorizado a contenido confidencial de issues en proyectos públicos.
よくある質問翻訳中…
What is CVE-2026-4524 — Authentication Bypass in GitLab?
CVE-2026-4524 is a medium severity vulnerability in GitLab CE/EE allowing authenticated users to access confidential issue content in public projects without proper authorization due to flawed authorization checks.
Am I affected by CVE-2026-4524 in GitLab?
You are affected if you are running GitLab CE/EE versions 18.9.1 through 18.11.3. Upgrade to 18.11.3 or later to mitigate the risk.
How do I fix CVE-2026-4524 in GitLab?
The recommended fix is to upgrade your GitLab instance to version 18.11.3 or a later version. Ensure you follow GitLab's upgrade procedures carefully.
Is CVE-2026-4524 being actively exploited?
As of May 14, 2026, there are no publicly known active campaigns exploiting CVE-2026-4524, but continuous monitoring is advised.
Where can I find the official GitLab advisory for CVE-2026-4524?
Refer to the official GitLab security advisory for CVE-2026-4524 on the GitLab website: [https://gitlab.com/security/advisories/](https://gitlab.com/security/advisories/)
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