High severity · published Aug 21, 2026
CVE-2026-68745
Apache CloudStack: SAML2 Signature Validation Silently Skipped for Cert-less IdP
8.1
CVSS
0.2%
EPSS
No
On KEV
Description
Certificate validation failures in SAML authentication in Apache CloudStack 4.20.3.0 and 4.22.1.0 on all platforms allow a malicious agent to forge a SAML response to the management server. The agent will have to spoof the ip address of the IdP or get an url of its own choosing registered in the management server, after which it can allow logging on with forged signatures.
Users are recommended to upgrade to versions 4.20.3.1 or 4.22.1.1 and above, which fix this issue.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AC
Apache CloudStack · Apache Software Foundation
4.5.2 through 4.20.3.0; 4.21.0.0 through 4.22.1.0 · source: vendor
CL
Cloudstack · Apache
4.5.2 before 4.20.3.1; 4.22.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-68745
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-68745
Mailing List
https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc
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