CVE-2023-29129: A vulnerability has been identified in Mendix SAML (Mendix 7 compatible) (All versions >= V1.17.3 < V1.18.0),

Q: How urgent is CVE-2023-29129?

Priority 55/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2023-29129 is a critical-severity flaw (CVSS 9.1) affecting saml. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been identified in Mendix SAML (Mendix 7 compatible) (All versions >= V1.17.3 < V1.18.0), Mendix SAML (Mendix 7 compatible) (All versions >= V1.16.4 < V1.17.3), Mendix SAML (Mendix 8 compatible) (All versions >= V2.3.0 < V2.4.0), Mendix SAML (Mendix 8 compatible) (All versions >= V2.2.0 < V2.3.0), Mendix SAML (Mendix 9 latest compatible, New Track) (All versions >= V3.3.1 < V3.6.1), Mendix SAML (Mendix 9 latest compatible, New

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-303, CWE-287
Published	2023-06-13
Last modified	2026-10-24

Publisher (CNA): Siemens AG · Vendor: mendix

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-06-13 09:15 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

mendix saml UPGRADE

Affected: >= 1.16.4 and < 1.18.0 · >= 2.2.0 and < 2.4.0 · >= 3.1.8 and < 3.6.1

Fixed in: 1.18.0, 2.4.0, 3.6.1

Safe to downgrade to: a release before 1.16.4

1. Check installed version

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

2. UPGRADE to 1.18.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade saml

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 1.16.4 (Debian / Ubuntu)

apt-cache madison saml sudo apt install saml=<VERSION_BEFORE_1.16.4> sudo apt-mark hold saml

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

dnf --showduplicates list saml sudo dnf downgrade saml-<VERSION_BEFORE_1.16.4> sudo dnf versionlock add saml

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.

Exact fixes by distribution

Fedora 46 · gnome-shell-extension-tiling-assistant · FIXED · 56-1.fc46 · FEDORA-2026-ebf66a5321 · source

sudo dnf upgrade --advisory=FEDORA-2026-ebf66a5321

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-2023-29129?

saml: upgrade to 1.18.0, 2.4.0, 3.6.1. Exact commands for each OS are on this page.

Is CVE-2023-29129 being exploited?

CVE-2023-29129 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-2023-29129 affect?

CVE-2023-29129 affects saml. Severity is critical (CVSS 9.1). A vulnerability has been identified in Mendix SAML (Mendix 7 compatible) (All versions >= V1.17.3 < V1.18.0), Mendix SAML (Mendix 7 compatible) (All versions >= V1.16.4 < V1.17.3), Mendix SAML (Mendix 8 compatible) (All versions >= V2.3.0 <

How urgent is CVE-2023-29129?

Priority 55/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-25957 CRITICAL 9.1 UPGRADE A vulnerability has been identified in Mendix SAML (Mendix 7 compatible) (All versions >= V1.16.4 < V1.17.3),

References

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