CVE-2026-4828: Improper authentication in the OAuth login functionality in Devolutions Server 2026.1.11 and earlier allows a

Routine

HIGH 8.2UPGRADE

CVE-2026-4828 is a high-severity flaw (CVSS 8.2) affecting devolutions server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper authentication in the OAuth login functionality in Devolutions Server 2026.1.11 and earlier allows a remote attacker with valid credentials to bypass multi-factor authentication via a crafted login request.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.2 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-1390
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: < 2025.3.18.0 · >= 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 2026.1.1.0

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 2026.1.1.0 (Debian / Ubuntu)

apt-cache madison devolutions-server sudo apt install devolutions-server=<VERSION_BEFORE_2026.1.1.0> 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_2026.1.1.0> 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-2026-4828?

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

Is CVE-2026-4828 being exploited?

CVE-2026-4828 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-2026-4828 affect?

CVE-2026-4828 affects devolutions server. Severity is high (CVSS 8.2). Improper authentication in the OAuth login functionality in Devolutions Server 2026.1.11 and earlier allows a remote attacker with valid credentials to bypass multi-factor authentication via a crafted login request.

How urgent is CVE-2026-4828?

Priority 33/100. High severity

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-2026-4927 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
CVE-2026-4925 MEDIUM 5.0 UPGRADE Improper access control in the users MFA feature in Devolutions Server allows an authenticated user to bypass

References

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