NCSC-2026-0168

Vulnerability from csaf_ncscnl - Published: 2026-05-28 06:49 - Updated: 2026-05-28 06:49
Summary
Kwetsbaarheden verholpen in GitLab Community Edition en Enterprise Edition
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 meerdere kwetsbaarheden verholpen in GitLab Community Edition en Enterprise Edition, specifiek in versies 12.7 tot voor 18.10.7, 18.11 tot voor 18.11.4, en 19.0 tot voor 19.0.1.
Interpretaties: De kwetsbaarheden betreffen verschillende aspecten van authenticatie, autorisatie en validatie binnen GitLab. Een denial of service kan worden veroorzaakt door onvoldoende validatie, waarbij een geauthenticeerde gebruiker de beschikbaarheid van de dienst kan verstoren. Daarnaast kunnen gebruikers met developer-permissies ongeautoriseerd toegang krijgen tot gevoelige deploymentdata door onjuiste autorisatiecontroles. Verder is er een probleem met onjuiste gebruikersidentiteitsresolutie, waardoor een geauthenticeerde gebruiker Duo AI-workflows kan activeren alsof hij een andere gebruiker is, wat leidt tot identiteitsvervalsing binnen deze workflows. Ook kunnen developer-rollen flowbeperkingen omzeilen die op groepsniveau zijn ingesteld, wat de toegangscontrole en workflow governance beïnvloedt. Een andere kwetsbaarheid maakt het mogelijk voor onbevoegde gebruikers om private projecten te enumereren, wat kan leiden tot blootstelling van gevoelige projectinformatie. Ten slotte kunnen geauthenticeerde gebruikers toegang krijgen tot continuous integration (CI) data die niet voor hen bedoeld is, door een fout in de toegangscontrole voor CI-data. De kwetsbaarheid met kenmerk CVE-2026-2710 wordt wel genoemd in de releasenotes van GitLab, maar is ingetrokken en heeft geen verdere impact.
Oplossingen: GitLab heeft updates uitgebracht in de genoemde versies om de diverse kwetsbaarheden te verhelpen door validatie- en autorisatielogica te corrigeren en de gebruikersidentiteitsresolutie te verbeteren. Zie bijgevoegde referenties voor meer informatie.
Kans: medium
Schade: high
CWE-639: Authorization Bypass Through User-Controlled Key
CWE-706: Use of Incorrectly-Resolved Name or Reference
CWE-770: Allocation of Resources Without Limits or Throttling
CWE-862: Missing Authorization
CWE-863: Incorrect Authorization
CVE-2026-1402

GitLab addressed a denial of service vulnerability affecting GitLab CE/EE versions 17.1 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1, exploitable by authenticated users due to insufficient validation.

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
Affected products
Product Identifier Version Remediation
vers:unknown/*
GitLab / GitLab
 vers:unknown/*
CVE-2026-2601

GitLab addressed a security vulnerability in specific GitLab EE versions where authenticated users with developer permissions could improperly access sensitive deployment data due to flawed authorization checks.

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
Affected products
Product Identifier Version Remediation
vers:unknown/*
GitLab / GitLab
 vers:unknown/*
CVE-2026-4868

GitLab EE versions prior to 18.10.7, 18.11.4, and 19.0.1 contained a vulnerability allowing authenticated users to impersonate others and trigger Duo AI workflows due to improper user identity resolution.

8.2 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
CWE-639 - Authorization Bypass Through User-Controlled Key
Affected products
Product Identifier Version Remediation
vers:unknown/*
GitLab / GitLab
 vers:unknown/*
CVE-2026-5296

GitLab addressed a security vulnerability in GitLab EE versions 18.7 to before 18.10.7, 18.11 to before 18.11.4, and 19.0 to before 19.0.1 that allowed developer-role users to bypass flow restrictions when foundational flows were enabled at the group level.

4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE-862 - Missing Authorization
Affected products
Product Identifier Version Remediation
vers:unknown/*
GitLab / GitLab
 vers:unknown/*
CVE-2026-6713

GitLab addressed a security vulnerability in versions 18.2 to before 18.10.7, 18.11 to before 18.11.4, and 19.0 to before 19.0.1 that allowed unauthorized users to enumerate private projects due to improper authorization checks.

5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE-863 - Incorrect Authorization
Affected products
Product Identifier Version Remediation
vers:unknown/*
GitLab / GitLab
 vers:unknown/*
CVE-2026-8716

GitLab addressed a vulnerability in versions 12.7 to before 18.10.7, 18.11 to before 18.11.4, and 19.0 to before 19.0.1 that allowed authenticated users to access continuous integration data from unintended reference types.

4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE-706 - Use of Incorrectly-Resolved Name or Reference
Affected products
Product Identifier Version Remediation
vers:unknown/*
GitLab / GitLab
 vers:unknown/*
References
To clipboard 

{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "nl",
    "notes": [
      {
        "category": "legal_disclaimer",
        "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 meerdere kwetsbaarheden verholpen in GitLab Community Edition en Enterprise Edition, specifiek in versies 12.7 tot voor 18.10.7, 18.11 tot voor 18.11.4, en 19.0 tot voor 19.0.1.",
        "title": "Feiten"
      },
      {
        "category": "description",
        "text": "De kwetsbaarheden betreffen verschillende aspecten van authenticatie, autorisatie en validatie binnen GitLab. Een denial of service kan worden veroorzaakt door onvoldoende validatie, waarbij een geauthenticeerde gebruiker de beschikbaarheid van de dienst kan verstoren. Daarnaast kunnen gebruikers met developer-permissies ongeautoriseerd toegang krijgen tot gevoelige deploymentdata door onjuiste autorisatiecontroles. Verder is er een probleem met onjuiste gebruikersidentiteitsresolutie, waardoor een geauthenticeerde gebruiker Duo AI-workflows kan activeren alsof hij een andere gebruiker is, wat leidt tot identiteitsvervalsing binnen deze workflows. Ook kunnen developer-rollen flowbeperkingen omzeilen die op groepsniveau zijn ingesteld, wat de toegangscontrole en workflow governance be\u00efnvloedt. Een andere kwetsbaarheid maakt het mogelijk voor onbevoegde gebruikers om private projecten te enumereren, wat kan leiden tot blootstelling van gevoelige projectinformatie. Ten slotte kunnen geauthenticeerde gebruikers toegang krijgen tot continuous integration (CI) data die niet voor hen bedoeld is, door een fout in de toegangscontrole voor CI-data.\n\nDe kwetsbaarheid met kenmerk CVE-2026-2710 wordt wel genoemd in de releasenotes van GitLab, maar is ingetrokken en heeft geen verdere impact.",
        "title": "Interpretaties"
      },
      {
        "category": "description",
        "text": "GitLab heeft updates uitgebracht in de genoemde versies om de diverse kwetsbaarheden te verhelpen door validatie- en autorisatielogica te corrigeren en de gebruikersidentiteitsresolutie te verbeteren. Zie bijgevoegde referenties voor meer informatie.",
        "title": "Oplossingen"
      },
      {
        "category": "general",
        "text": "medium",
        "title": "Kans"
      },
      {
        "category": "general",
        "text": "high",
        "title": "Schade"
      },
      {
        "category": "general",
        "text": "Authorization Bypass Through User-Controlled Key",
        "title": "CWE-639"
      },
      {
        "category": "general",
        "text": "Use of Incorrectly-Resolved Name or Reference",
        "title": "CWE-706"
      },
      {
        "category": "general",
        "text": "Allocation of Resources Without Limits or Throttling",
        "title": "CWE-770"
      },
      {
        "category": "general",
        "text": "Missing Authorization",
        "title": "CWE-862"
      },
      {
        "category": "general",
        "text": "Incorrect Authorization",
        "title": "CWE-863"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "cert@ncsc.nl",
      "name": "Nationaal Cyber Security Centrum",
      "namespace": "https://www.ncsc.nl/"
    },
    "references": [
      {
        "category": "external",
        "summary": "Reference",
        "url": "https://about.gitlab.com/releases/2026/05/27/patch-release-gitlab-19-0-1-released/"
      }
    ],
    "title": "Kwetsbaarheden verholpen in GitLab Community Edition en Enterprise Edition",
    "tracking": {
      "current_release_date": "2026-05-28T06:49:55.052377Z",
      "generator": {
        "date": "2025-08-04T16:30:00Z",
        "engine": {
          "name": "V.A.",
          "version": "1.3"
        }
      },
      "id": "NCSC-2026-0168",
      "initial_release_date": "2026-05-28T06:49:55.052377Z",
      "revision_history": [
        {
          "date": "2026-05-28T06:49:55.052377Z",
          "number": "1.0.0",
          "summary": "Initiele versie"
        }
      ],
      "status": "final",
      "version": "1.0.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:unknown/*",
                "product": {
                  "name": "vers:unknown/*",
                  "product_id": "CSAFPID-1"
                }
              }
            ],
            "category": "product_name",
            "name": "GitLab"
          }
        ],
        "category": "vendor",
        "name": "GitLab"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-1402",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "other",
          "text": "Allocation of Resources Without Limits or Throttling",
          "title": "CWE-770"
        },
        {
          "category": "description",
          "text": "GitLab addressed a denial of service vulnerability affecting GitLab CE/EE versions 17.1 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1, exploitable by authenticated users due to insufficient validation.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-1402 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-1402.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-1402"
    },
    {
      "cve": "CVE-2026-2601",
      "cwe": {
        "id": "CWE-862",
        "name": "Missing Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Missing Authorization",
          "title": "CWE-862"
        },
        {
          "category": "description",
          "text": "GitLab addressed a security vulnerability in specific GitLab EE versions where authenticated users with developer permissions could improperly access sensitive deployment data due to flawed authorization checks.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-2601 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-2601.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-2601"
    },
    {
      "cve": "CVE-2026-4868",
      "cwe": {
        "id": "CWE-639",
        "name": "Authorization Bypass Through User-Controlled Key"
      },
      "notes": [
        {
          "category": "other",
          "text": "Authorization Bypass Through User-Controlled Key",
          "title": "CWE-639"
        },
        {
          "category": "description",
          "text": "GitLab EE versions prior to 18.10.7, 18.11.4, and 19.0.1 contained a vulnerability allowing authenticated users to impersonate others and trigger Duo AI workflows due to improper user identity resolution.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-4868 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-4868.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-4868"
    },
    {
      "cve": "CVE-2026-5296",
      "cwe": {
        "id": "CWE-862",
        "name": "Missing Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Missing Authorization",
          "title": "CWE-862"
        },
        {
          "category": "description",
          "text": "GitLab addressed a security vulnerability in GitLab EE versions 18.7 to before 18.10.7, 18.11 to before 18.11.4, and 19.0 to before 19.0.1 that allowed developer-role users to bypass flow restrictions when foundational flows were enabled at the group level.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-5296 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-5296.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"
          ]
        }
      ],
      "title": "CVE-2026-5296"
    },
    {
      "cve": "CVE-2026-6713",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "notes": [
        {
          "category": "other",
          "text": "Incorrect Authorization",
          "title": "CWE-863"
        },
        {
          "category": "description",
          "text": "GitLab addressed a security vulnerability in versions 18.2 to before 18.10.7, 18.11 to before 18.11.4, and 19.0 to before 19.0.1 that allowed unauthorized users to enumerate private projects due to improper authorization checks.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-6713 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-6713.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-6713"
    },
    {
      "cve": "CVE-2026-8716",
      "cwe": {
        "id": "CWE-706",
        "name": "Use of Incorrectly-Resolved Name or Reference"
      },
      "notes": [
        {
          "category": "other",
          "text": "Use of Incorrectly-Resolved Name or Reference",
          "title": "CWE-706"
        },
        {
          "category": "description",
          "text": "GitLab addressed a vulnerability in versions 12.7 to before 18.10.7, 18.11 to before 18.11.4, and 19.0 to before 19.0.1 that allowed authenticated users to access continuous integration data from unintended reference types.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-8716 | NCSC-NL Website",
          "url": "https://vulnerabilities.ncsc.nl/csaf/v2/2026/cve-2026-8716.json"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-1"
          ]
        }
      ],
      "title": "CVE-2026-8716"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.