GitLab Enterprise Edition up to 18.9.6/18.10.5/18.11.2 File deserialization

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in GitLab Enterprise Edition up to 18.9.6/18.10.5/18.11.2. It has been rated as problematic. This affects an unknown function of the component File Handler. This manipulation causes deserialization. This vulnerability is handled as CVE-2026-1184. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in GitLab Enterprise Edition up to 18.9.6/18.10.5/18.11.2 and classified as problematic. Affected by this vulnerability is an unknown function of the component File Handler. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect availability. The summary by CVE is:

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.

The weakness was released by a92847865. It is possible to read the advisory at hackerone.com. This vulnerability is known as CVE-2026-1184 since 01/19/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 316460 (Linux Distros Unpatched Vulnerability : CVE-2026-1184), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.9.7, 18.10.6 or 18.11.3 eliminates this vulnerability. The upgrade is hosted for download at about.gitlab.com.

The vulnerability is also documented in the databases at Tenable (316460) and EUVD (EUVD-2026-30219). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CNA Base Score: 6.5
CNA Vector (GitLab): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 316460
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-1184

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Enterprise Edition 18.9.7/18.10.6/18.11.3

Timelineinfo

01/19/2026 CVE reserved
05/14/2026 +114 days Advisory disclosed
05/14/2026 +0 days VulDB entry created
05/23/2026 +8 days VulDB entry last update

Sourcesinfo

Vendor: gitlab.com

Advisory: hackerone.com
Researcher: a92847865
Status: Confirmed

CVE: CVE-2026-1184 (🔒)
GCVE (CVE): GCVE-0-2026-1184
GCVE (VulDB): GCVE-100-363811
EUVD: 🔒

Entryinfo

Created: 05/14/2026 08:43
Updated: 05/23/2026 01:48
Changes: 05/14/2026 08:43 (66), 05/14/2026 09:40 (1), 05/19/2026 10:56 (11), 05/23/2026 01:48 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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