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CVE-2026-1184

Deserialization of Untrusted Data in GitLab

Published: May 14, 2026Updated: May 16, 2026 Sources: CVE List NVD BDUCWE-502
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.3%
Top 75.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-502

Affected Products

gitlabgitlab
SaaSWeb App
DevTools & CI / ci-cd
GitlabGitLab Inc.DevTools & CI
GitLabGitLab
SaaSWeb App
DevTools & CI / ci-cd
gitlabcommercialNLDevTools & CIaka gitlab ce/ee
gitlab inc.commercialUSDevTools & CI

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
about.gitlab.com
https://gitlab.com/gitlab-org/gitlab/-/work_items/586634
gitlab.com
https://hackerone.com/reports/3515842
hackerone.com
and 1 more references View all →

Timeline

Published
May 14, 2026
Last Updated
May 16, 2026

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