CVE-2026-103446 (GCVE-0-2026-103446)

Vulnerability from cvelistv5 – Published: 2026-09-30 17:13 – Updated: 2026-09-30 17:13
VLAI
Title
WikiLambda exposes anonymous execution of unsaved Abstract Wikipedia fragments
Summary
Authorization bypass through User-Controlled key vulnerability in The Wikimedia Foundation MediaWiki WikiLambda extension allows Authentication Bypass. This issue affects MediaWiki WikiLambda extension: 1.46.
CWE
  • CWE-639 - Authorization bypass through User-Controlled key
Impacted products
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "MediaWiki WikiLambda extension",
          "repo": "https://gerrit.wikimedia.org/r/mediawiki/extensions/WikiLambda",
          "vendor": "The Wikimedia Foundation",
          "versions": [
            {
              "status": "affected",
              "version": "1.46"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Marco Paciaroni (BomboBombone)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "Authorization bypass through User-Controlled key vulnerability in The Wikimedia Foundation MediaWiki WikiLambda extension allows Authentication Bypass.\u003cp\u003eThis issue affects MediaWiki WikiLambda extension: 1.46.\u003c/p\u003e"
            }
          ],
          "value": "Authorization bypass through User-Controlled key vulnerability in The Wikimedia Foundation MediaWiki WikiLambda extension allows Authentication Bypass.\n\nThis issue affects MediaWiki WikiLambda extension: 1.46."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-115",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-115 Authentication Bypass"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "YES",
            "Recovery": "USER",
            "Safety": "NEGLIGIBLE",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "exploitMaturity": "PROOF_OF_CONCEPT",
            "privilegesRequired": "LOW",
            "providerUrgency": "AMBER",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "PASSIVE",
            "valueDensity": "CONCENTRATED",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/S:N/AU:Y/R:U/V:C/RE:M/U:Amber",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "MODERATE"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-639",
              "description": "CWE-639 Authorization bypass through User-Controlled key",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-30T17:13:02.339Z",
        "orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
        "shortName": "wikimedia-foundation"
      },
      "references": [
        {
          "url": "https://phabricator.wikimedia.org/T435086"
        },
        {
          "url": "https://gerrit.wikimedia.org/r/q/If2c05b109672fc65f63372f86c768859dc6639fd"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "WikiLambda exposes anonymous execution of unsaved Abstract Wikipedia fragments",
      "x_generator": {
        "engine": "Vulnogram 1.0.5"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
    "assignerShortName": "wikimedia-foundation",
    "cveId": "CVE-2026-103446",
    "datePublished": "2026-09-30T17:13:02.339Z",
    "dateReserved": "2026-09-30T15:41:01.270Z",
    "dateUpdated": "2026-09-30T17:13:02.339Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-103446",
      "date": "2026-10-01",
      "epss": "0.00413",
      "percentile": "0.33188"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "MediaWiki WikiLambda extension",
                "repo": "https://gerrit.wikimedia.org/r/mediawiki/extensions/WikiLambda",
                "vendor": "The Wikimedia Foundation",
                "versions": [
                  {
                    "status": "affected",
                    "version": "1.46"
                  }
                ]
              }
            ],
            "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Authorization bypass through User-Controlled key vulnerability in The Wikimedia Foundation MediaWiki WikiLambda extension allows Authentication Bypass.\n\nThis issue affects MediaWiki WikiLambda extension: 1.46."
          }
        ],
        "id": "CVE-2026-103446",
        "lastModified": "2026-09-30T19:05:23.307",
        "metrics": {
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "YES",
                "Recovery": "USER",
                "Safety": "NEGLIGIBLE",
                "attackComplexity": "HIGH",
                "attackRequirements": "PRESENT",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 7.4,
                "baseSeverity": "HIGH",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "PROOF_OF_CONCEPT",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "LOW",
                "providerUrgency": "AMBER",
                "subAvailabilityImpact": "HIGH",
                "subConfidentialityImpact": "HIGH",
                "subIntegrityImpact": "HIGH",
                "userInteraction": "PASSIVE",
                "valueDensity": "CONCENTRATED",
                "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:C/RE:M/U:Amber",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "MODERATE"
              },
              "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-09-30T18:18:17.017",
        "references": [
          {
            "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
            "url": "https://gerrit.wikimedia.org/r/q/If2c05b109672fc65f63372f86c768859dc6639fd"
          },
          {
            "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
            "url": "https://phabricator.wikimedia.org/T435086"
          }
        ],
        "sourceIdentifier": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-639"
              }
            ],
            "source": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



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…

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…