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CVE-2026-59335— Case-Sensitive Authorization Check Bypass via Identity Zone ID Case Manipulation Leads to Full UAA Compromise

Quick assessment

Affected
Cloud Foundry UAA
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.

Cloud Foundry UAA 的 Identity Zone Endpoint 在身份区授权检查中存在不恰当处理大小写敏感性的问题（CWE-178）。攻击者仅需持有 权限，即可通过以非小写形式（例如 ）在请求路径和主体中引用区域标识符，绕过该权限不应授予访问特权 （系统）身份区的预期限制。 授权层对系统区域标识符进行区分大小写的比较，而底层 MySQL 持久层在其默认排序规则下对标识符进行不区分大小写的解析，导致请求被错误授权，并最终解析到真实的系统区域记录。 这使得攻击者能够使用攻击者控制的密钥材料覆盖系统

CVSS 8.7 · High
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I. Basic Information for CVE-2026-59335

Vulnerability Information
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Vulnerability Title
Case-Sensitive Authorization Check Bypass via Identity Zone ID Case Manipulation Leads to Full UAA Compromise
Source: CVE Program / CVE List V5
Vulnerability Description
Improper handling of case sensitivity (CWE-178) in the identity zone authorization check in the Identity Zone Endpoint in Cloud Foundry UAA allows a remote authenticated attacker holding only the zones.write authority to bypass the intended restriction that this authority does not grant access to the privileged uaa (system) identity zone, by referring to the zone identifier in a non-lowercase form (e.g. UAA) in the request path and body. The authorization layer performs a case-sensitive comparison against the system zone identifier, while the underlying MySQL persistence layer resolves identifiers case-insensitively under its default collation, so the request is authorized incorrectly and is then resolved against the real system zone record. This allows the attacker to overwrite the system zone's JWT signing key with attacker-controlled key material, forge JWTs claiming the admin client and administrator scopes, and fully compromise UAA and any Cloud Foundry deployment that trusts it. This issue only affects UAA deployments backed by MySQL using its default collation; PostgreSQL and HSQLDB backends are not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
大小写敏感处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cloud Foundry UAA 0 ~ 78.16.0 -
Cloud Foundry cf-deployment 0 ~ 57.0.0 -

II. Public POCs for CVE-2026-59335

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III. Intelligence Information for CVE-2026-59335

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Security Blog Posts for CVE-2026-59335 (1)

IV. Related Vulnerabilities

Same product: UAA
Same vendor: Cloud Foundry
Same weakness: CWE-178

V. Comments for CVE-2026-59335

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