CVE-2026-59335 Case-Sensitive Authorization Check Bypass via Identity Zone ID Case Manipulation Leads to Full UAA Compromise
Authenticated attackers can bypass authorization checks to compromise the system identity zone and forge admin JWTs in MySQL-backed Cloud Foundry UAA deployments.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59335?
CVE-2026-59335 is a high-severity authentication bypass vulnerability in Cloud Foundry UAA, published on 25 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-178
Which versions are affected by CVE-2026-59335?
How do I fix CVE-2026-59335?
No fix has been published for CVE-2026-59335 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-59335 being exploited?
There is no known exploitation of CVE-2026-59335 in the wild and no public exploit code.
Sources
Also known as GHSA-m647-7qf2-2rmg.