CVE-2026-68745: Certificate validation failures in SAML authentication in Apache CloudStack 4.20.3.0 and 4.22.1.0 on all platf

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HIGH 8.1REMOTEWATCHLISTUPGRADE

CVE-2026-68745 is a high-severity flaw (CVSS 8.1) affecting cloudstack. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 abo

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-347
Published	2026-08-21
Last modified	2026-10-16

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-10-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-21 09:16 UTCPublished CVE record published
2026-10-16 15:10 UTCUpdated Record last modified

apache cloudstack UPGRADE

Affected: >= 4.5.2 and < 4.20.3.1 · 4.22.1.0

Fixed in: 4.20.3.1

Safe to downgrade to: a release before 4.5.2

1. Check installed version

apt-cache policy cloudstack || rpm -q cloudstack || cloudstack --version

2. UPGRADE to 4.20.3.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cloudstack

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cloudstack

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 4.5.2 (Debian / Ubuntu)

apt-cache madison cloudstack sudo apt install cloudstack=<VERSION_BEFORE_4.5.2> sudo apt-mark hold cloudstack

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cloudstack sudo dnf downgrade cloudstack-<VERSION_BEFORE_4.5.2> sudo dnf versionlock add cloudstack

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-68745?

cloudstack: upgrade to 4.20.3.1. Exact commands for each OS are on this page.

Is CVE-2026-68745 being exploited?

CVE-2026-68745 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-68745 affect?

CVE-2026-68745 affects cloudstack. Severity is high (CVSS 8.1). 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

How urgent is CVE-2026-68745?

Priority 41/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

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References

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