{"id":"CVE-2026-26047","state":"PUBLISHED","title":"Moodle: moodle: uncontrolled resource consumption in tex formula editor leading to denial of service","description":"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.","publishedAt":"2026-02-21T05:40:11.001Z","updatedAt":"2026-02-23T19:30:25.686Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"fedora"},"assigner":"fedora","products":["moodle"],"affected":[{"packageName":"moodle","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.5.9","versionType":"semver"},{"version":"5.0.0","status":"affected","lessThan":"5.0.5","versionType":"semver"},{"version":"5.1.0","status":"affected","lessThan":"5.1.2","versionType":"semver"}],"collectionURL":"https://github.com/moodle/moodle"}],"references":["https://access.redhat.com/security/cve/CVE-2026-26047","https://bugzilla.redhat.com/show_bug.cgi?id=2440905"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/26xxx/CVE-2026-26047.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-26047","state":"PUBLISHED","datePublished":"2026-02-21T05:40:11.001Z","dateUpdated":"2026-02-23T19:30:25.686Z","assignerShortName":"fedora","assignerOrgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","dateReserved":"2026-02-10T13:30:03.986Z"},"containers":{"cna":{"title":"Moodle: moodle: uncontrolled resource consumption in tex formula editor leading to denial of service","descriptions":[{"lang":"en","value":"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."}],"affected":[{"packageName":"moodle","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.5.9","versionType":"semver"},{"version":"5.0.0","status":"affected","lessThan":"5.0.5","versionType":"semver"},{"version":"5.1.0","status":"affected","lessThan":"5.1.2","versionType":"semver"}],"collectionURL":"https://github.com/moodle/moodle"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-26047","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2440905","name":"RHBZ#2440905","tags":["issue-tracking","x_refsource_REDHAT"]}],"metrics":[{"other":{"content":{"value":"Moderate","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"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"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"fedora","orgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","dateUpdated":"2026-02-21T05:40:11.001Z"},"datePublic":"2026-02-19T00:00:00.000Z","x_redhatCweChain":"CWE-400: Uncontrolled Resource Consumption","timeline":[{"lang":"en","time":"2026-02-19T08:55:57.177Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-02-19T00:00:00.000Z","value":"Made public."}],"credits":[{"lang":"en","value":"Red Hat would like to thank Aleksey Solovev (Positive Technologies) for reporting this issue."}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-23T19:29:50.672029Z","id":"CVE-2026-26047","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-23T19:30:25.686Z"}}]}}}