CVE-2026-19478: GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.11.11, 19.0 before 1

This week

CRITICAL 9.4REMOTEUPGRADE

CVE-2026-19478 is a critical-severity flaw (CVSS 9.4) affecting gitlab. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.11.11, 19.0 before 19.0.8, 19.1 before 19.1.6, and 19.2 before 19.2.4 that under certain conditions could allow an unauthenticated user to remotely modify or delete public projects and user data via a GraphQL directive.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.4 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.2% (top 18%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-08-17
Last modified	2026-09-02

Publisher (CNA): GitLab Inc. · Vendor: gitlab

Last updated 2026-09-02 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-17 20:16 UTCPublished CVE record published
2026-09-02 12:43 UTCUpdated Record last modified

gitlab gitlab UPGRADE

Affected: >= 18.2.0 and < 18.11.11 · >= 19.0.0 and < 19.0.8 · >= 19.1.0 and < 19.1.6 · >= 19.2.0 and < 19.2.4

Fixed in: 18.11.11, 19.0.8, 19.1.6, 19.2.4

Safe to downgrade to: a release before 18.2.0

1. Check installed version

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

2. UPGRADE to 18.11.11 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gitlab

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 18.2.0 (Debian / Ubuntu)

apt-cache madison gitlab sudo apt install gitlab=<VERSION_BEFORE_18.2.0> sudo apt-mark hold gitlab

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

dnf --showduplicates list gitlab sudo dnf downgrade gitlab-<VERSION_BEFORE_18.2.0> sudo dnf versionlock add gitlab

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 ELN · openbao · FIXED · 2.6.5-1.eln159 · FEDORA-2026-77adf886ae · source

sudo dnf upgrade --advisory=FEDORA-2026-77adf886ae

Fedora 46 · sugar-turtleart · FIXED · 220-16.fc46 · FEDORA-2026-b79483c788 · source

sudo dnf upgrade --advisory=FEDORA-2026-b79483c788

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: davkharrr/CVE-2026-19478-PoC (11 stars)
GitHub PoC: dinosn/gitlab-cve-2026-19478-lab (11 stars)
GitHub PoC: EQSTLab/CVE-2026-19478 (5 stars)
Nuclei scan template: GitLab CE/EE - GraphQL @gl_introduced Arbitrary Method Invocation

Advisories and coverage

Official advisories

GitLab Security Releases: GitLab Critical Patch Release: 19.2.4, 19.1.6, 19.0.8, 18.11.11 2026-08-17

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-2026-19478?

gitlab: upgrade to 18.11.11, 19.0.8, 19.1.6, 19.2.4. Exact commands for each OS are on this page.

Is CVE-2026-19478 being exploited?

CVE-2026-19478 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-2026-19478 affect?

CVE-2026-19478 affects gitlab. Severity is critical (CVSS 9.4). GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.11.11, 19.0 before 19.0.8, 19.1 before 19.1.6, and 19.2 before 19.2.4 that under certain conditions could allow an unauthenticated user to remotely mo

How urgent is CVE-2026-19478?

Priority 63/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

GitLab vulnerabilities

Related CVEs

CVE-2026-10086 HIGH 8.7 UPGRADE GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.
CVE-2026-6896 HIGH 8.7 UPGRADE GitLab has remediated an issue in GitLab EE affecting all versions from 13.11 before 18.11.7, 19.0 before 19.0
CVE-2026-84284 MEDIUM 5.3 UPGRADE GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.11 before 19.2.8, 19.3 before 19
CVE-2025-10903 MEDIUM 6.5 UPGRADE GitLab has remediated an issue in GitLab EE affecting all versions from 11.10 before 19.1.7, 19.2 before 19.2.
CVE-2026-82632 LOW 3.1 UPGRADE GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.9 before 19.2.8, 19.3 before 19.

References

← Back to latest CVEs