TI-2026-18259 Aliases CVE-2026-22734 GHSA-vp68-f85j-5gw3

Cloud Foundry UAA SAML 2.0 Signature Bypass

MEDIUM 43CWE-290Published 2026-04-16 · Updated 2026-04-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-290.

Summary

Cloud Foundry UUA is vulnerable to a bypass that allows an attacker to obtain a token for any user and gain access to UAA-protected systems. This vulnerability exists when SAML 2.0 bearer assertions are enabled for a client, as the UAA accepts SAML 2.0 bearer assertions that are neither signed nor encrypted. This issue affects UUA from v77.30.0 to v78.7.0 (inclusive) and it affects CF Deployment from v48.7.0 to v54.14.0 (inclusive).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00364 30th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cloud Foundry	UUA	v77.21.0 – v78.8.0	—	No fix listed	CNA

UUA VendorCloud Foundry Affected v77.21.0 – v78.8.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-22734
2026-10-03 Alias added: GHSA-vp68-f85j-5gw3

References

Other 1

https://www.cloudfoundry.org/blog/cve-2026-22734-uaa-saml-2-0-signature-bypass/

TI-2018-11240 UAA Privilege Escalation CVSS 3.0CRITICAL 9.9
TI-2018-01169 Log Cache logs UAA client secret on startup CVSS 3.0CRITICAL 9.8
TI-2018-07868 Cloud Foundry UAA MFA does not prevent brute force of MFA code CVSS 3.0CRITICAL 9.8
TI-2019-02813 Java Projects using HTTP to fetch dependencies CVSS 3.1CRITICAL 9.8
TI-2024-24613 Authentication bypass by spoofing in Cloud Foundry haproxy-boshrelease CVSS 3.1CRITICAL 9.1
TI-2018-11235 UAA can issue tokens across identity providers if users with matching usernames exist CVSS 3.0HIGH 8.8

See all 83 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences