GitLab Community Edition/Enterprise Edition up to 18.7.5/18.8.5/18.9.1 Import crlf injection

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in GitLab Community Edition and Enterprise Edition up to 18.7.5/18.8.5/18.9.1. This issue affects some unknown processing of the component Import. This manipulation causes crlf injection. This vulnerability is handled as CVE-2026-3848. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in GitLab Community Edition and Enterprise Edition up to 18.7.5/18.8.5/18.9.1. It has been declared as critical. Affected by this vulnerability is an unknown code of the component Import. The manipulation with an unknown input leads to a crlf injection vulnerability. The CWE definition for the vulnerability is CWE-93. The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.11 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user to make unintended internal requests through proxy environments under certain conditions due to improper input validation in import functionality.

The weakness was released by Shelld3C. It is possible to read the advisory at gitlab.com. This vulnerability is known as CVE-2026-3848 since 03/09/2026. 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 301877 (GitLab 8.11 < 18.7.6 / 18.8 < 18.8.6 / 18.9 < 18.9.2 (CVE-2026-3848)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.7.6, 18.8.6 or 18.9.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (301877). Be aware that VulDB is the high quality source 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: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.0
CNA Vector (GitLab): 🔒

CVSSv2info

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

Exploitinginfo

Class: Crlf injection
CWE: CWE-93 / CWE-74 / CWE-707
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: 301877
Nessus Name: GitLab 8.11 < 18.7.6 / 18.8 < 18.8.6 / 18.9 < 18.9.2 (CVE-2026-3848)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Community Edition/Enterprise Edition 18.7.6/18.8.6/18.9.2

Timelineinfo

03/09/2026 CVE reserved
03/11/2026 +2 days Advisory disclosed
03/11/2026 +0 days VulDB entry created
03/14/2026 +3 days VulDB entry last update

Sourcesinfo

Vendor: gitlab.com

Advisory: gitlab.com
Researcher: Shelld3C
Status: Confirmed

CVE: CVE-2026-3848 (🔒)
GCVE (CVE): GCVE-0-2026-3848
GCVE (VulDB): GCVE-100-350431

Entryinfo

Created: 03/11/2026 16:56
Updated: 03/14/2026 15:05
Changes: 03/11/2026 16:56 (66), 03/12/2026 05:21 (2), 03/14/2026 15:05 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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