Vulnerability-Lookup

CVE-2026-3848 (GCVE-0-2026-3848)

Vulnerability from cvelistv5 – Published: 2026-03-11 15:37 – Updated: 2026-03-12 14:23

Title

Improper Neutralization of CRLF Sequences ('CRLF Injection') in GitLab

Summary

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.

Severity

5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-12 14:23 UTC

CWE

CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Assigner

GitLab mitre root

References

2 references

URL	Tags
https://gitlab.com/gitlab-org/gitlab/-/work_items…
https://about.gitlab.com/releases/2026/03/11/patc…

Impacted products

1 product

Vendor	Product	Version	CPE status
GitLab	GitLab	Affected: 8.11 , < 18.7.6 (semver) Affected: 18.8 , < 18.8.6 (semver) Affected: 18.9 , < 18.9.2 (semver) cpe:2.3:a:gitlab:gitlab::::::::

Credits

Thanks [shelld3c](https://hackerone.com/shells3c) for reporting this vulnerability.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3848",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-12T14:23:34.060887Z",
                "version": "2.0.3"
              },
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            }
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        "providerMetadata": {
          "dateUpdated": "2026-03-12T14:23:58.017Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "cpes": [
            "cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
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            }
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        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Thanks [shelld3c](https://hackerone.com/shells3c) for reporting this vulnerability."
        }
      ],
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
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            "baseScore": 5,
            "baseSeverity": "MEDIUM",
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        }
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      ],
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    }
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    "dateReserved": "2026-03-09T19:33:36.812Z",
    "dateUpdated": "2026-03-12T14:23:58.017Z",
    "state": "PUBLISHED"
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    "vulnrichment": {
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bit-gitlab-2026-3848

Vulnerability from bitnami_vulndb

Published

2026-03-13 09:35

Modified

2026-09-08 08:34

Summary

Improper Neutralization of CRLF Sequences ('CRLF Injection') in GitLab

Details

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "gitlab",
        "purl": "pkg:bitnami/gitlab"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.11.0"
            },
            {
              "fixed": "18.7.6"
            },
            {
              "introduced": "18.8.0"
            },
            {
              "fixed": "18.8.6"
            },
            {
              "introduced": "18.9.0"
            },
            {
              "fixed": "18.9.2"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-3848"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*",
      "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "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.",
  "id": "BIT-gitlab-2026-3848",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-03-13T09:35:49.642Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/577298"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3848"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027) in GitLab"
}

CERTFR-2026-AVI-0276

Vulnerability from certfr_avis - Published: 2026-03-12 - Updated: 2026-03-12

De multiples vulnérabilités ont été découvertes dans GitLab. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et une injection de code indirecte à distance (XSS).

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
GitLab	N/A	GitLab Community Edition (CE) et Gitlab Enterprise Edition (EE) versions antérieures à 18.7.6
GitLab	N/A	GitLab Community Edition (CE) et Gitlab Enterprise Edition (EE) versions 18.8.x antérieures à 18.8.6
GitLab	N/A	GitLab Community Edition (CE) et Gitlab Enterprise Edition (EE) versions 18.9.x antérieures à 18.9.2

References

Title

Publication Time

FKIE_CVE-2026-3848

Vulnerability from fkie_nvd - Published: 2026-03-11 16:16 - Updated: 2026-06-17 10:44

Severity

5.0 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Summary

References

	URL	Tags
	cve@gitlab.com	https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/	Release Notes, Vendor Advisory
	cve@gitlab.com	https://gitlab.com/gitlab-org/gitlab/-/work_items/577298	Broken Link

Impacted products

Vendor	Product	Version
gitlab	gitlab	*
gitlab	gitlab	*
gitlab	gitlab	*
gitlab	gitlab	*
gitlab	gitlab	*
gitlab	gitlab	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "product": "GitLab",
          "repo": "git://git@gitlab.com:gitlab-org/gitlab.git",
          "vendor": "GitLab",
          "versions": [
            {
              "lessThan": "18.7.6",
              "status": "affected",
              "version": "8.11",
              "versionType": "semver"
            },
            {
              "lessThan": "18.8.6",
              "status": "affected",
              "version": "18.8",
              "versionType": "semver"
            },
            {
              "lessThan": "18.9.2",
              "status": "affected",
              "version": "18.9",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "cve@gitlab.com"
    }
  ],
  "configurations": [
    {
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        {
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              "matchCriteriaId": "452C4C38-FBAA-43F8-A149-E241432E1BBB",
              "versionEndExcluding": "18.7.6",
              "versionStartIncluding": "8.11.0",
              "vulnerable": true
            },
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            },
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              "matchCriteriaId": "B703CB01-7F6D-4D6E-AE88-CF2F8012CA27",
              "versionEndExcluding": "18.8.6",
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            }
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    },
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      "lang": "es",
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    }
  ],
  "id": "CVE-2026-3848",
  "lastModified": "2026-06-17T10:44:20.487",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 1.4,
        "source": "cve@gitlab.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-3848",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-12T14:23:34.060887Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-11T16:16:47.310",
  "references": [
    {
      "source": "cve@gitlab.com",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/"
    },
    {
      "source": "cve@gitlab.com",
      "tags": [
        "Broken Link"
      ],
      "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/577298"
    }
  ],
  "sourceIdentifier": "cve@gitlab.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-93"
        }
      ],
      "source": "cve@gitlab.com",
      "type": "Secondary"
    }
  ]
}

GHSA-J592-X6JP-9FG8

Vulnerability from github – Published: 2026-03-11 18:30 – Updated: 2026-03-11 18:30

Details

Severity

5.0 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-3848"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-93"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-11T16:16:47Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-j592-x6jp-9fg8",
  "modified": "2026-03-11T18:30:32Z",
  "published": "2026-03-11T18:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3848"
    },
    {
      "type": "WEB",
      "url": "https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/577298"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

NCSC-2026-0093

Vulnerability from csaf_ncscnl - Published: 2026-03-12 14:42 - Updated: 2026-03-12 14:42

Summary

Kwetsbaarheden verholpen in GitLab

Scope

15 vulnerabilities in this advisory, including CVE-2026-3848.

CVE-2026-3848

GitLab addressed a security vulnerability in versions 8.11 to before 18.7.6, 18.8 to before 18.8.6, and 18.9 to before 18.9.2 that allowed authenticated users to perform unintended internal requests via proxy environments due to improper input validation in the import feature.

5.0 (Medium)


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

Known affected: 1 product

Open the full advisory

ubuntu-cve-2026-3848

Vulnerability from osv_ubuntu

Published

2026-03-11 16:16

Modified

2026-03-19 05:25

Summary

Details

Severity

5.0 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-3848	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-3848	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gitlab",
            "binary_version": "8.5.8+dfsg-5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "gitlab",
        "purl": "pkg:deb/ubuntu/gitlab@8.5.8+dfsg-5?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.4.3+dfsg-9",
        "8.4.3+dfsg-12",
        "8.5.8+dfsg-5"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-3848",
  "modified": "2026-03-19T05:25:34Z",
  "published": "2026-03-11T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-3848"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-3848"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-3848"
  ]
}

WID-SEC-W-2026-0697

Vulnerability from csaf_certbund - Published: 2026-03-11 23:00 - Updated: 2026-03-11 23:00

Summary

GitLab: Mehrere Schwachstellen

Severity

Hoch

Scope

14 vulnerabilities in this advisory, including CVE-2026-3848.

CVE-2026-3848

Known affected: 3 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-3848 (GCVE-0-2026-3848)

bit-gitlab-2026-3848

Vulnerability from bitnami_vulndb

CERTFR-2026-AVI-0276

Solutions

FKIE_CVE-2026-3848

GHSA-J592-X6JP-9FG8

NCSC-2026-0093

ubuntu-cve-2026-3848

Vulnerability from osv_ubuntu

WID-SEC-W-2026-0697

Tags

Sightings

Nomenclature