CVE-2026-3848Network attack vector

Internal request forgery via CRLF injection

Published Mar 11, 2026 · Updated Mar 11, 2026

CRLF injection in GitLab 8.11 through 18.7.5, 18.8 before 18.8.6, and 18.9 before 18.9.2 allows remote authenticated users to make internal requests. The import path fails to neutralize CRLF sequences in user-controlled input before a proxy processes the resulting outbound request; GitLab has not disclosed the affected function or parameter. Exploitation requires authenticated access and a proxy environment, and the published impact is limited to unintended internal requests with confidentiality impact only.

CVSS severity5.0
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CRLF injection in GitLab 8.11 through 18.7.5, 18.8 before 18.8.6, and 18.9 before 18.9.2 allows remote authenticated users to make internal requests. The import path fails to neutralize CRLF sequences in user-controlled input before a proxy processes the resulting outbound request; GitLab has not disclosed the affected function or parameter. Exploitation requires authenticated access and a proxy environment, and the published impact is limited to unintended internal requests with confidentiality impact only.

The record

CVE
CVE-2026-3848
Published
Mar 11, 2026
Updated
Mar 11, 2026
Vendor
GitLab
Product
GitLab
Classifications
CWE-93, CAPEC-15, CAPEC-81, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=18.8 <18.8.6
  2. Affected versionversion=18.9 <18.9.2
  3. Affected versionversion=8.11 <18.7.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GitLab · GitLabversion=18.8 <18.8.6; version=18.9 <18.9.2; version=8.11 <18.7.6

Published CVSS scores

5.0GitLabCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')
CAPEC-15Command Delimiters
CAPEC-81Web Server Logs Tampering
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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