CVE-2026-4989: Improper input validation in the gateway health check feature in Devolutions Server allows a low-privileged au

Routine

MEDIUM 4.3UPGRADE

CVE-2026-4989 is a medium-severity flaw (CVSS 4.3) affecting devolutions server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper input validation in the gateway health check feature in Devolutions Server allows a low-privileged authenticated user to perform server-side request forgery (SSRF), potentially leading to information disclosure, via a crafted API request. This issue affects Server: from 2026.1.1 through 2026.1.11, from 2025.3.1 through 2025.3.17.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-04-01
Last modified	2026-10-26

Publisher (CNA): Devolutions Inc. · Vendor: devolutions

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-01 16:23 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

devolutions devolutions server UPGRADE

Affected: >= 2025.3.1.0 and < 2025.3.18.0 · >= 2026.1.1.0 and < 2026.1.12.0

Fixed in: 2025.3.18.0, 2026.1.12.0

Safe to downgrade to: a release before 2025.3.1.0

1. Check installed version

apt-cache policy devolutions-server || rpm -q devolutions-server || devolutions-server --version

2. UPGRADE to 2025.3.18.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade devolutions-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade devolutions-server

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 2025.3.1.0 (Debian / Ubuntu)

apt-cache madison devolutions-server sudo apt install devolutions-server=<VERSION_BEFORE_2025.3.1.0> sudo apt-mark hold devolutions-server

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

dnf --showduplicates list devolutions-server sudo dnf downgrade devolutions-server-<VERSION_BEFORE_2025.3.1.0> sudo dnf versionlock add devolutions-server

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-2026-4989?

devolutions server: upgrade to 2025.3.18.0, 2026.1.12.0. Exact commands for each OS are on this page.

Is CVE-2026-4989 being exploited?

CVE-2026-4989 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-2026-4989 affect?

CVE-2026-4989 affects devolutions server. Severity is medium (CVSS 4.3). Improper input validation in the gateway health check feature in Devolutions Server allows a low-privileged authenticated user to perform server-side request forgery (SSRF), potentially leading to information disclosure, via a crafted API r

How urgent is CVE-2026-4989?

Priority 16/100. No elevated risk signals yet.

Related CVEs

CVE-2026-6706 MEDIUM 6.5 UPGRADE Improper access control in the vault documentation feature in Devolutions Server allows an authenticated att
CVE-2026-5175 MEDIUM 5.0 UPGRADE Improper access control in the multi-factor authentication (MFA) management API in Devolutions Server allows a
CVE-2026-4828 HIGH 8.2 UPGRADE Improper authentication in the OAuth login functionality in Devolutions Server 2026.1.11 and earlier allows a
CVE-2026-4927 MEDIUM 6.5 UPGRADE Exposure of sensitive information in the users MFA feature in Devolutions Server allows users with user manage
CVE-2026-4829 MEDIUM 5.4 UPGRADE Improper authentication in the external OAuth authentication flow in Devolutions Server 2026.1.11 and earlier

References

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