CVE-2025-46827: Graylog is a free and open log management platform

Routine

HIGH 8.0UPGRADE

CVE-2025-46827 is a high-severity flaw (CVSS 8.0) affecting graylog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Graylog is a free and open log management platform. Prior to versions 6.0.14, 6.1.10, and 6.2.0, it is possible to obtain user session cookies by submitting an HTML form as part of an Event Definition Remediation Step field. For this attack to succeed, the attacker needs a user account with permissions to create event definitions, while the user must have permissions to view alerts. Additionally, an active Input must be present on the Graylog ser

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-05-07
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: graylog

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-05-07 16:15 UTCPublished CVE record published
2026-06-17 09:27 UTCUpdated Record last modified

graylog graylog UPGRADE

Affected: < 6.0.14 · >= 6.1.0 and < 6.1.10

Fixed in: 6.0.14, 6.1.10

Safe to downgrade to: a release before 6.1.0

1. Check installed version

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

2. UPGRADE to 6.0.14 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade graylog

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 6.1.0 (Debian / Ubuntu)

apt-cache madison graylog sudo apt install graylog=<VERSION_BEFORE_6.1.0> sudo apt-mark hold graylog

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

dnf --showduplicates list graylog sudo dnf downgrade graylog-<VERSION_BEFORE_6.1.0> sudo dnf versionlock add graylog

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-2025-46827?

graylog: upgrade to 6.0.14, 6.1.10. Exact commands for each OS are on this page.

Is CVE-2025-46827 being exploited?

CVE-2025-46827 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-2025-46827 affect?

CVE-2025-46827 affects graylog. Severity is high (CVSS 8.0). Graylog is a free and open log management platform. Prior to versions 6.0.14, 6.1.10, and 6.2.0, it is possible to obtain user session cookies by submitting an HTML form as part of an Event Definition Remediation Step field. For this attack

How urgent is CVE-2025-46827?

Priority 33/100. High severity

Related CVEs

CVE-2026-1441 MEDIUM 6.1 DOWNGRADE Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused
CVE-2026-1440 MEDIUM 6.1 DOWNGRADE Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused
CVE-2026-1439 MEDIUM 6.1 DOWNGRADE Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused
CVE-2026-1438 MEDIUM 6.1 DOWNGRADE Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused
CVE-2026-1437 MEDIUM 6.1 DOWNGRADE Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused

References

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