NCSC-2026-0103

Vulnerability from csaf_ncscnl - Published: 2026-03-26 09:48 - Updated: 2026-03-26 09:48
Summary
Kwetsbaarheden verholpen in GitLab
Notes
The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions: NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein. NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory. This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings.
Feiten: GitLab heeft kwetsbaarheden verholpen in versies 18.8.7, 18.9.3, en 18.10.1.
Interpretaties: De kwetsbaarheden omvatten onder andere denial-of-service scenario's die konden worden veroorzaakt door geauthenticeerde gebruikers via specifieke webhook configuraties en continue integratie inputs. Daarnaast waren er problemen met onjuiste toegangscontrole voor gebruikers met de Planner rol, waardoor gevoelige metadata toegankelijk was. Ongeauthenticeerde gebruikers konden API-tokens voor zelf-gehoste AI-modellen ophalen, en er waren ook kwetsbaarheden die het mogelijk maakten om WebAuthn twee-factor authenticatie te omzeilen. Verder waren er problemen met onvoldoende sanitization van Mermaid diagrammen en HTML-inhoud, wat leidde tot de mogelijkheid om ongeautoriseerde acties uit te voeren of gebruikersaccounts te manipuleren. Tot slot waren er tekortkomingen in CSRF-bescherming die ongeauthenticeerde gebruikers in staat stelden om GraphQL-mutaties uit te voeren.
Oplossingen: GitLab heeft patches uitgebracht om de kwetsbaarheden te verhelpen. Zie bijgevoegde referenties voor meer informatie.
Kans: medium
Schade: high
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CWE-288: Authentication Bypass Using an Alternate Path or Channel
CWE-306: Missing Authentication for Critical Function
CWE-352: Cross-Site Request Forgery (CSRF)
CWE-407: Inefficient Algorithmic Complexity
CWE-770: Allocation of Resources Without Limits or Throttling
CWE-862: Missing Authorization
CWE-863: Incorrect Authorization
CWE-1284: Improper Validation of Specified Quantity in Input
CVE-2025-13078

GitLab addressed a denial of service vulnerability affecting versions 16.10 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1, which allowed authenticated users to cause excessive resource consumption via specific webhook configurations.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-1284 - Improper Validation of Specified Quantity in Input
CVE-2025-13436

GitLab addressed a denial of service vulnerability affecting versions 13.7 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1, which could be exploited by authenticated users via excessive resource consumption in CI pipelines.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-770 - Allocation of Resources Without Limits or Throttling
CVE-2025-14595

GitLab addressed a security vulnerability in certain GitLab EE versions where authenticated users with the Planner role could access restricted security category metadata and attributes within group security configurations.

4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE-862 - Missing Authorization
CVE-2026-1724

GitLab addressed a security vulnerability in specific GitLab EE versions that allowed unauthenticated users to access API tokens for self-hosted AI models due to improper access control.

6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE-306 - Missing Authentication for Critical Function
CVE-2026-2370

GitLab resolved a security vulnerability in Jira Connect that permitted users with minimal permissions to access installation credentials and impersonate the GitLab app due to inadequate authorization checks.

CVE-2026-2726

GitLab addressed a security flaw in versions 11.10 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 that permitted authenticated users to execute unauthorized actions on merge requests across different projects due to improper access control during cross-repository operations.

4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE-863 - Incorrect Authorization
CVE-2026-2745

GitLab versions 7.11 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 contained a vulnerability allowing unauthenticated users to bypass WebAuthn two-factor authentication due to inconsistent input validation.

6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE-288 - Authentication Bypass Using an Alternate Path or Channel
CVE-2026-2973

GitLab addressed a security flaw in versions 17.7 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 that permitted authenticated users to execute arbitrary JavaScript through improperly sanitized Mermaid diagrams.

5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE-2026-2995

GitLab addressed a security vulnerability in multiple Enterprise Edition versions that allowed authenticated users to add email addresses to other user accounts due to improper HTML content sanitization.

7.7 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CVE-2026-3857

GitLab addressed a security vulnerability in versions 17.10 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 that permitted unauthenticated users to execute arbitrary GraphQL mutations due to insufficient CSRF protection.

8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE-352 - Cross-Site Request Forgery (CSRF)
CVE-2026-3988

GitLab addressed a denial of service vulnerability in versions 18.5 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 caused by improper input validation in GraphQL requests allowing unauthenticated users to render the instance unresponsive.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-407 - Inefficient Algorithmic Complexity
CVE-2026-4363

GitLab addressed a security flaw in GitLab EE versions 18.1 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 where improper caching of authorization decisions allowed authenticated users to access unauthorized resources.

3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
CWE-863 - Incorrect Authorization
References
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{
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    "csaf_version": "2.0",
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    "notes": [
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        "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this page to enhance access to its information and security advisories. The use of this security advisory is subject to the following terms and conditions:\n\n    NCSC-NL makes every reasonable effort to ensure that the content of this page is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or continuous keeping up-to-date. The information contained in this security advisory is intended solely for the purpose of providing general information to professional users. No rights can be derived from the information provided therein.\n\n    NCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of this security advisory. This includes damage resulting from the inaccuracy of incompleteness of the information contained in the advisory.\n    This security advisory is subject to Dutch law. All disputes related to or arising from the use of this advisory will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
      },
      {
        "category": "description",
        "text": "GitLab heeft kwetsbaarheden verholpen in versies 18.8.7, 18.9.3, en 18.10.1.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheden omvatten onder andere denial-of-service scenario\u0027s die konden worden veroorzaakt door geauthenticeerde gebruikers via specifieke webhook configuraties en continue integratie inputs. Daarnaast waren er problemen met onjuiste toegangscontrole voor gebruikers met de Planner rol, waardoor gevoelige metadata toegankelijk was. Ongeauthenticeerde gebruikers konden API-tokens voor zelf-gehoste AI-modellen ophalen, en er waren ook kwetsbaarheden die het mogelijk maakten om WebAuthn twee-factor authenticatie te omzeilen. Verder waren er problemen met onvoldoende sanitization van Mermaid diagrammen en HTML-inhoud, wat leidde tot de mogelijkheid om ongeautoriseerde acties uit te voeren of gebruikersaccounts te manipuleren. Tot slot waren er tekortkomingen in CSRF-bescherming die ongeauthenticeerde gebruikers in staat stelden om GraphQL-mutaties uit te voeren.",
        "title": "Interpretaties"
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      {
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        "title": "CWE-80"
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        "text": "Authentication Bypass Using an Alternate Path or Channel",
        "title": "CWE-288"
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        "text": "Missing Authentication for Critical Function",
        "title": "CWE-306"
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        "category": "general",
        "text": "Cross-Site Request Forgery (CSRF)",
        "title": "CWE-352"
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        "title": "CWE-407"
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        "text": "Allocation of Resources Without Limits or Throttling",
        "title": "CWE-770"
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        "title": "CWE-862"
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      {
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        "text": "Incorrect Authorization",
        "title": "CWE-863"
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    "title": "Kwetsbaarheden verholpen in GitLab",
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      },
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          "text": "Improper Validation of Specified Quantity in Input",
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          "title": "Summary"
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        }
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          "category": "other",
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        }
      ],
      "scores": [
        {
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      "title": "CVE-2025-14595"
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      "cwe": {
        "id": "CWE-306",
        "name": "Missing Authentication for Critical Function"
      },
      "notes": [
        {
          "category": "other",
          "text": "Missing Authentication for Critical Function",
          "title": "CWE-306"
        },
        {
          "category": "description",
          "text": "GitLab addressed a security vulnerability in specific GitLab EE versions that allowed unauthenticated users to access API tokens for self-hosted AI models due to improper access control.",
          "title": "Summary"
        }
      ],
      "product_status": {
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          "CSAFPID-2"
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          "category": "self",
          "summary": "CVE-2026-1724 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-1724.json"
        }
      ],
      "scores": [
        {
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
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      ],
      "title": "CVE-2026-1724"
    },
    {
      "cve": "CVE-2026-2370",
      "notes": [
        {
          "category": "description",
          "text": "GitLab resolved a security vulnerability in Jira Connect that permitted users with minimal permissions to access installation credentials and impersonate the GitLab app due to inadequate authorization checks.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-2370 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-2370.json"
        }
      ],
      "title": "CVE-2026-2370"
    },
    {
      "cve": "CVE-2026-2726",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Authorization",
          "title": "CWE-863"
        },
        {
          "category": "description",
          "text": "GitLab addressed a security flaw in versions 11.10 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 that permitted authenticated users to execute unauthorized actions on merge requests across different projects due to improper access control during cross-repository operations.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-2726 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-2726.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-2726"
    },
    {
      "cve": "CVE-2026-2745",
      "cwe": {
        "id": "CWE-288",
        "name": "Authentication Bypass Using an Alternate Path or Channel"
      },
      "notes": [
        {
          "category": "other",
          "text": "Authentication Bypass Using an Alternate Path or Channel",
          "title": "CWE-288"
        },
        {
          "category": "description",
          "text": "GitLab versions 7.11 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 contained a vulnerability allowing unauthenticated users to bypass WebAuthn two-factor authentication due to inconsistent input validation.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-2745 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-2745.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-2745"
    },
    {
      "cve": "CVE-2026-2973",
      "cwe": {
        "id": "CWE-79",
        "name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
          "title": "CWE-79"
        },
        {
          "category": "description",
          "text": "GitLab addressed a security flaw in versions 17.7 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 that permitted authenticated users to execute arbitrary JavaScript through improperly sanitized Mermaid diagrams.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-2973 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-2973.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-2973"
    },
    {
      "cve": "CVE-2026-2995",
      "cwe": {
        "id": "CWE-80",
        "name": "Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)"
      },
      "notes": [
        {
          "category": "other",
          "text": "Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)",
          "title": "CWE-80"
        },
        {
          "category": "description",
          "text": "GitLab addressed a security vulnerability in multiple Enterprise Edition versions that allowed authenticated users to add email addresses to other user accounts due to improper HTML content sanitization.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-2995 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-2995.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-2995"
    },
    {
      "cve": "CVE-2026-3857",
      "cwe": {
        "id": "CWE-352",
        "name": "Cross-Site Request Forgery (CSRF)"
      },
      "notes": [
        {
          "category": "other",
          "text": "Cross-Site Request Forgery (CSRF)",
          "title": "CWE-352"
        },
        {
          "category": "description",
          "text": "GitLab addressed a security vulnerability in versions 17.10 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 that permitted unauthenticated users to execute arbitrary GraphQL mutations due to insufficient CSRF protection.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-3857 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-3857.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-3857"
    },
    {
      "cve": "CVE-2026-3988",
      "cwe": {
        "id": "CWE-407",
        "name": "Inefficient Algorithmic Complexity"
      },
      "notes": [
        {
          "category": "other",
          "text": "Inefficient Algorithmic Complexity",
          "title": "CWE-407"
        },
        {
          "category": "description",
          "text": "GitLab addressed a denial of service vulnerability in versions 18.5 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 caused by improper input validation in GraphQL requests allowing unauthenticated users to render the instance unresponsive.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-3988 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-3988.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-3988"
    },
    {
      "cve": "CVE-2026-4363",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Authorization",
          "title": "CWE-863"
        },
        {
          "category": "description",
          "text": "GitLab addressed a security flaw in GitLab EE versions 18.1 to before 18.8.7, 18.9 to before 18.9.3, and 18.10 to before 18.10.1 where improper caching of authorization decisions allowed authenticated users to access unauthorized resources.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1",
          "CSAFPID-2"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-4363 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-4363.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1",
            "CSAFPID-2"
          ]
        }
      ],
      "title": "CVE-2026-4363"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.