CVE-2026-1101: GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5

Routine

MEDIUM 6.5UPGRADE

CVE-2026-1101 is a medium-severity flaw (CVSS 6.5) 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 EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to cause denial of service to the GitLab instance due to improper input validation in GraphQL queries.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-1284
Published	2026-04-08
Last modified	2026-07-25

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

Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 23:16 UTCPublished CVE record published
2026-07-25 11:10 UTCUpdated Record last modified

gitlab gitlab UPGRADE

Affected: >= 18.2 and < 18.8.9 · >= 18.9.0 and < 18.9.5 · >= 18.10.0 and < 18.10.3

Fixed in: 18.8.9, 18.9.5, 18.10.3

Safe to downgrade to: a release before 18.2

1. Check installed version

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

2. UPGRADE to 18.8.9 (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 (Debian / Ubuntu)

apt-cache madison gitlab sudo apt install gitlab=<VERSION_BEFORE_18.2> 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> 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.

Advisories and coverage

Official advisories

GitLab Security Releases: GitLab Patch Release: 18.10.3, 18.9.5, 18.8.9 2026-04-08

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-2026-1101?

gitlab: upgrade to 18.8.9, 18.9.5, 18.10.3. Exact commands for each OS are on this page.

Is CVE-2026-1101 being exploited?

CVE-2026-1101 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-2026-1101 affect?

CVE-2026-1101 affects gitlab. Severity is medium (CVSS 6.5). GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to cause denial of service to the GitLab instance due to

How urgent is CVE-2026-1101?

Priority 32/100. No elevated risk signals yet.

Software pages

GitLab vulnerabilities

Related CVEs

CVE-2026-15723 HIGH 8.2 UPGRADE GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.1 before 19.3.6, 19.4 before 19.
CVE-2026-13319 MEDIUM 4.3 UPGRADE GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.10 before 19.3.6, 19.4 before 19
CVE-2026-12664 MEDIUM 6.8 UPGRADE GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 19.3.6, 19.4 before 19.
CVE-2026-112326 LOW 3.1 UPGRADE GitLab has remediated an issue in GitLab EE affecting all versions from 17.8 before 19.3.6, 19.4 before 19.4.3
CVE-2026-112212 HIGH 7.5 UPGRADE GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 19.3.6, 19.4 before 19.

References

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