High severity · published May 14, 2026
CVE-2026-1184
Deserialization of Untrusted Data in GitLab
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
GitLab has remediated an issue in GitLab EE affecting all versions from 11.9 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause denial of service by uploading a specially crafted file due to improper validation.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
GitLab · GitLab
11.9 before 18.9.7; 18.10 before 18.10.6; 18.11 before 18.11.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1184
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1184
Release Notes
https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
Not Applicable
https://gitlab.com/gitlab-org/gitlab/-/work_items/586634
Permissions Required
https://hackerone.com/reports/3515842
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