Vulnerability · Published Aug 21, 2026 · Assigned by apache

CVE-2026-68745Apache CloudStack: SAML2 Signature Validation Silently Skipped for Cert-less IdP

High 8.1

In plain English

A high-severity security flaw in Apache CloudStack from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.2%top 89.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Apache Software Foundation	Apache CloudStack	4.5.2 – through 4.20.3.04.21.0.0 – through 4.22.1.0

Weakness: CWE-347 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc vendor-advisory