CVE-2026-66797— Apache CloudStack: Unauthorised comment creation and disclosure
Quick assessment
Affected
Apache Software Foundation Apache CloudStack
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
CloudStack 的注释功能存在访问控制不当的问题，导致未经授权的用户可以创建和查看注释。 addAnnotation 和 listAnnotation API 在指定实体 UUID 时会执行所有权检查，但未能正确尊重检查结果。因此，任何经过身份验证的用户只需提供目标实体的 UUID，即可向非其拥有的实体写入注释，并泄露该实体上已有的注释/评论内容。 此问题影响 Apache CloudStack 以下版本：4.15.0.0 至 4.20.3.0，以及 4.21.0.0 至 4.22.1.0。 建议用户升级到已
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1530 · Data from Cloud StorageAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache CloudStack | 4.16.0.0≤ 4.20.3.0 |
affected |
4.21.0.0≤ 4.22.1.0 |
affected |
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I. Basic Information for CVE-2026-66797
Vulnerability Information
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Vulnerability Title
Apache CloudStack: Unauthorised comment creation and disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
Improper access control in CloudStack's annotation functionality allows unauthorized comment creation and disclosure.
The addAnnotation and listAnnotation APIs perform an ownership check when an entity's UUID is specified, but fail to honor its result correctly. This lets any authenticated user write annotations to, and disclose existing annotations/comments on, an entity they don't own by simply supplying its UUID.
This issue affects Apache CloudStack: from 4.15.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.
Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache CloudStack | 4.16.0.0 ~ 4.20.3.0 | - |
|
II. Public POCs for CVE-2026-66797
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-66797 (1)
Same Patch Batch · Apache Software Foundation · 2026-08-21 · 21 CVEs total
| CVE-2026-59654 | 6.8 MEDIUM | Apache CloudStack: DoS caused by database connections leak |
| CVE-2026-61397 | Apache CloudStack: OAuth2 Token Cross-Request Leak | |
| CVE-2026-68745 | Apache CloudStack: SAML2 Signature Validation Silently Skipped for Cert-less IdP | |
| CVE-2026-66722 | Apache CloudStack: ProjectRole & ProjectRolePermission authorization issue | |
| CVE-2026-66721 | Apache CloudStack: Authorization issue with listHostTags for domain admins | |
| CVE-2026-65613 | Apache CloudStack: Webhook Deliveries Incorrect Access | |
| CVE-2026-62440 | Apache CloudStack: Improper access control in Kubernetes Service (CKS) cluster manipulatio | |
| CVE-2026-61422 | Apache CloudStack: Authenticated pre-validation SSRF in registerTemplate | |
| CVE-2026-61400 | Apache CloudStack: Get and Run Diagnostics Command Injection | |
| CVE-2026-61399 | Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Lock User Function in UI | |
| CVE-2026-61398 | Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Instance Reset Password Fun | |
| CVE-2026-59799 | Apache CloudStack: Missing Privilege Check in Two-Factor Authentication Disable Flow | |
| CVE-2026-59780 | Apache CloudStack: LDAP provider configuration disclosure | |
| CVE-2026-59657 | Apache CloudStack: Sensitive Information Disclosure via Cleartext Storage in AsyncJob | |
| CVE-2026-59655 | Apache CloudStack: Unauthenticated OAuth provider client-secret disclosure | |
| CVE-2026-59085 | Apache CloudStack: Server-Side Request Forgery (SSRF) vulnerability in webhook module | |
| CVE-2026-50222 | Apache CloudStack: Improper access control in Userdata reference APIs | |
| CVE-2026-50112 | Apache CloudStack: RCE and SSRF in direct download, metalink and NFS templates | |
| CVE-2026-47359 | Apache CloudStack: OS Command Injection due to unsanitized mount command | |
| CVE-2026-63046 | Apache InLong: Agent Installer — Command Injection to RCE via Default Credentials |
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V. Comments for CVE-2026-66797
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