GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2020-26409 (GCVE-0-2020-26409)

Vulnerability from cvelistv5 – Published: 2020-12-11 01:17 – Updated: 2024-08-04 15:56
VLAI
Summary
A DOS vulnerability exists in Gitlab CE/EE >=10.3, <13.4.7,>=13.5, <13.5.5,>=13.6, <13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields.
CWE
  • Uncontrolled resource consumption in GitLab
Impacted products
Vendor Product Version CPE status
GitLab GitLab CE/EE Affected: >=10.3
Affected: <13.4.7
Affected: >=13.5
Affected: <13.5.5
Affected: >=13.6
Affected: <13.6.2
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T15:56:04.626Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/259626"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://hackerone.com/reports/990461"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "GitLab CE/EE",
          "vendor": "GitLab",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e=10.3"
            },
            {
              "status": "affected",
              "version": "\u003c13.4.7"
            },
            {
              "status": "affected",
              "version": "\u003e=13.5"
            },
            {
              "status": "affected",
              "version": "\u003c13.5.5"
            },
            {
              "status": "affected",
              "version": "\u003e=13.6"
            },
            {
              "status": "affected",
              "version": "\u003c13.6.2"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Thanks [misha98857](https://hackerone.com/misha98857) for reporting this vulnerability through our HackerOne bug bounty program"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Uncontrolled resource consumption in GitLab",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-12-11T01:17:28.000Z",
        "orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
        "shortName": "GitLab"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/259626"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/990461"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@gitlab.com",
          "ID": "CVE-2020-26409",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "GitLab CE/EE",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "\u003e=10.3"
                          },
                          {
                            "version_value": "\u003c13.4.7"
                          },
                          {
                            "version_value": "\u003e=13.5"
                          },
                          {
                            "version_value": "\u003c13.5.5"
                          },
                          {
                            "version_value": "\u003e=13.6"
                          },
                          {
                            "version_value": "\u003c13.6.2"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "GitLab"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Thanks [misha98857](https://hackerone.com/misha98857) for reporting this vulnerability through our HackerOne bug bounty program"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields."
            }
          ]
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.2,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Uncontrolled resource consumption in GitLab"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://gitlab.com/gitlab-org/gitlab/-/issues/259626",
              "refsource": "MISC",
              "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/259626"
            },
            {
              "name": "https://hackerone.com/reports/990461",
              "refsource": "MISC",
              "url": "https://hackerone.com/reports/990461"
            },
            {
              "name": "https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json",
              "refsource": "CONFIRM",
              "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
    "assignerShortName": "GitLab",
    "cveId": "CVE-2020-26409",
    "datePublished": "2020-12-11T01:17:28.000Z",
    "dateReserved": "2020-10-01T00:00:00.000Z",
    "dateUpdated": "2024-08-04T15:56:04.626Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2020-26409",
      "date": "2026-09-20",
      "epss": "0.0126",
      "percentile": "0.68284"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "matchCriteriaId": "BD344029-BC42-4233-AA0F-37DC87F8AB1F",
                    "versionEndExcluding": "13.4.7",
                    "versionStartIncluding": "10.3.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "512D9B32-3BDA-49DD-BB42-EAD4270B5FDD",
                    "versionEndExcluding": "13.4.7",
                    "versionStartIncluding": "10.3.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "matchCriteriaId": "468AFC4C-4AFE-4502-AE04-CEC567CC9454",
                    "versionEndExcluding": "13.5.5",
                    "versionStartIncluding": "13.5.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "C03EE1D3-7824-43A8-ACA2-7EE7EA9B638E",
                    "versionEndExcluding": "13.5.5",
                    "versionStartIncluding": "13.5.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "matchCriteriaId": "8A470CCF-C038-44D4-AB14-B9134C0E7ABC",
                    "versionEndExcluding": "13.6.2",
                    "versionStartIncluding": "13.6.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "matchCriteriaId": "63A5C9B5-F86B-4066-8042-865AB4DD4859",
                    "versionEndExcluding": "13.6.2",
                    "versionStartIncluding": "13.6.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A DOS vulnerability exists in Gitlab CE/EE \u003e=10.3, \u003c13.4.7,\u003e=13.5, \u003c13.5.5,\u003e=13.6, \u003c13.6.2 that allows an attacker to trigger uncontrolled resource by bypassing input validation in markdown fields."
          },
          {
            "lang": "es",
            "value": "Se presenta una vulnerabilidad de DOS en Gitlab CE/EE versiones posteriores a 10.3 incluy\u00e9ndola, versiones anteriores a 13.4.7, versiones posteriores a 13.5 incluy\u00e9ndola, versiones anteriores a 13.5.5,  versiones posteriores a 13.6 incluy\u00e9ndola, versiones anteriores 13.6.2, que permite a un atacante activar un recurso no controlado al omitir la comprobaci\u00f3n de entrada en los campos markdown"
          }
        ],
        "id": "CVE-2020-26409",
        "lastModified": "2024-11-21T05:19:52.760",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "SINGLE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 4.0,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 8.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "LOW",
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 1.4,
              "source": "cve@gitlab.com",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2020-12-11T02:15:11.490",
        "references": [
          {
            "source": "cve@gitlab.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json"
          },
          {
            "source": "cve@gitlab.com",
            "tags": [
              "Broken Link"
            ],
            "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/259626"
          },
          {
            "source": "cve@gitlab.com",
            "tags": [
              "Permissions Required"
            ],
            "url": "https://hackerone.com/reports/990461"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-26409.json"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Broken Link"
            ],
            "url": "https://gitlab.com/gitlab-org/gitlab/-/issues/259626"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Permissions Required"
            ],
            "url": "https://hackerone.com/reports/990461"
          }
        ],
        "sourceIdentifier": "cve@gitlab.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-20"
              },
              {
                "lang": "en",
                "value": "CWE-400"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


Loading…