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CVE-2026-3848— Improper Neutralization of CRLF Sequences ('CRLF Injection') in GitLab

Quick assessment

Affected
GitLab GitLab
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GitLab是美国GitLab公司的一个端到端软件开发平台，具有内置的版本控制、问题跟踪、代码审查、CI/CD（持续集成和持续交付）等功能。 GitLab存在注入漏洞，该漏洞源于导入功能输入验证不当，可能导致经过身份验证的用户在特定条件下通过代理环境发起非预期的内部请求。

CVSS 5.0 · Medium EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-3848

Vulnerability Information
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Vulnerability Title
Improper Neutralization of CRLF Sequences ('CRLF Injection') in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5
Vulnerability Title
GitLab 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitLab是美国GitLab公司的一个端到端软件开发平台，具有内置的版本控制、问题跟踪、代码审查、CI/CD（持续集成和持续交付）等功能。 GitLab存在注入漏洞，该漏洞源于导入功能输入验证不当，可能导致经过身份验证的用户在特定条件下通过代理环境发起非预期的内部请求。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab 8.11 ~ 18.7.6 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-3848

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III. Intelligence Information for CVE-2026-3848

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Patches & Fixes for CVE-2026-3848 (1)

Same Patch Batch · GitLab · 2026-03-11 · 14 CVEs total

CVE-2026-1090 8.7 HIGH Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-1069 7.5 HIGH Uncontrolled Recursion in GitLab
CVE-2025-14513 7.5 HIGH Improper Validation of Specified Quantity in Input in GitLab
CVE-2025-13929 7.5 HIGH Allocation of Resources Without Limits or Throttling in GitLab
CVE-2025-13690 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2025-12576 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-1732 4.3 MEDIUM Improper Removal of Sensitive Information Before Storage or Transfer in GitLab
CVE-2026-1663 4.3 MEDIUM Missing Authorization in GitLab
CVE-2026-0602 4.3 MEDIUM Authentication Bypass Using an Alternate Path or Channel in GitLab
CVE-2025-12555 4.3 MEDIUM Incorrect Authorization in GitLab
CVE-2026-1230 4.1 MEDIUM Use of Incorrectly-Resolved Name or Reference in GitLab
CVE-2025-12704 3.5 LOW Missing Authorization in GitLab
CVE-2025-12697 2.2 LOW Improper Encoding or Escaping of Output in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-93

V. Comments for CVE-2026-3848

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