FKIE_CVE-2026-26047

Vulnerability from fkie_nvd - Published: 2026-02-21 06:17 - Updated: 2026-02-26 19:45
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
A denial-of-service vulnerability was identified in Moodle’s TeX formula editor. When rendering TeX content using mimetex, insufficient execution time limits could allow specially crafted formulas to consume excessive server resources. An authenticated user could abuse this behavior to degrade performance or cause service interruption.
References
patrick@puiterwijk.orghttps://access.redhat.com/security/cve/CVE-2026-26047Third Party Advisory
patrick@puiterwijk.orghttps://bugzilla.redhat.com/show_bug.cgi?id=2440905Third Party Advisory
Impacted products
Vendor Product Version
moodle moodle *
moodle moodle *
moodle moodle *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "80B1995C-45EB-41E5-A497-D565964750A1",
              "versionEndExcluding": "4.5.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8CDB0968-2E2B-4C2F-BF59-9479D1EEC287",
              "versionEndExcluding": "5.0.5",
              "versionStartIncluding": "5.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "36833D08-9C77-48B1-9240-7F326F5BB1CC",
              "versionEndExcluding": "5.1.2",
              "versionStartIncluding": "5.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A denial-of-service vulnerability was identified in Moodle\u2019s TeX formula editor. When rendering TeX content using mimetex, insufficient execution time limits could allow specially crafted formulas to consume excessive server resources. An authenticated user could abuse this behavior to degrade performance or cause service interruption."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad de denegaci\u00f3n de servicio en el editor de f\u00f3rmulas TeX de Moodle. Al renderizar contenido TeX usando mimetex, si los l\u00edmites de tiempo de ejecuci\u00f3n son insuficientes, podr\u00edan permitir que f\u00f3rmulas especialmente dise\u00f1adas consuman excesivos recursos del servidor. Un usuario autenticado podr\u00eda abusar de este comportamiento para degradar el rendimiento o causar interrupci\u00f3n del servicio."
    }
  ],
  "id": "CVE-2026-26047",
  "lastModified": "2026-02-26T19:45:29.417",
  "metrics": {
    "cvssMetricV31": [
      {
        "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": "patrick@puiterwijk.org",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-21T06:17:00.377",
  "references": [
    {
      "source": "patrick@puiterwijk.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2026-26047"
    },
    {
      "source": "patrick@puiterwijk.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2440905"
    }
  ],
  "sourceIdentifier": "patrick@puiterwijk.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "patrick@puiterwijk.org",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • 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.
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  • 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.



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