{"id":"CVE-2026-73849","state":"PUBLISHED","title":"emlog allows unauthenticated reinstallation via `install.php?action=reinstall`.","description":"Emlog is an open source website building system. In 2.6.26 and earlier, install.php accepts action=reinstall without authentication and deliberately skips the already-installed check because the guard runs only when $act != 'reinstall'. A remote attacker can submit hostname, dbuser, dbpasswd, dbname, dbprefix, username, password, and email values to cause file_put_contents('config.php', $config) to overwrite the configuration with attacker-controlled database settings and create a new administrator account. No fixed version is available as of this review.","publishedAt":"2026-08-14T17:37:20.232Z","updatedAt":"2026-08-18T02:12:53.649Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["emlog emlog"],"affected":[{"vendor":"emlog","product":"emlog","versions":[{"version":"<= 2.6.26","status":"affected"}]}],"references":["https://github.com/emlog/emlog/security/advisories/GHSA-v5qq-p8mp-3gxm"],"weaknesses":["CWE-306"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73849.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73849","state":"PUBLISHED","datePublished":"2026-08-14T17:37:20.232Z","dateUpdated":"2026-08-18T02:12:53.649Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-13T17:44:28.644Z"},"containers":{"cna":{"title":"emlog allows unauthenticated reinstallation via `install.php?action=reinstall`.","descriptions":[{"lang":"en","value":"Emlog is an open source website building system. In 2.6.26 and earlier, install.php accepts action=reinstall without authentication and deliberately skips the already-installed check because the guard runs only when $act != 'reinstall'. A remote attacker can submit hostname, dbuser, dbpasswd, dbname, dbprefix, username, password, and email values to cause file_put_contents('config.php', $config) to overwrite the configuration with attacker-controlled database settings and create a new administrator account. No fixed version is available as of this review."}],"affected":[{"vendor":"emlog","product":"emlog","versions":[{"version":"<= 2.6.26","status":"affected"}]}],"references":[{"url":"https://github.com/emlog/emlog/security/advisories/GHSA-v5qq-p8mp-3gxm","name":"https://github.com/emlog/emlog/security/advisories/GHSA-v5qq-p8mp-3gxm","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","lang":"en","description":"CWE-306: Missing Authentication for Critical Function","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-14T17:37:20.232Z"},"source":{"advisory":"GHSA-v5qq-p8mp-3gxm","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/emlog/emlog/security/advisories/GHSA-v5qq-p8mp-3gxm","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-18T02:12:25.955172Z","id":"CVE-2026-73849","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-18T02:12:53.649Z"}}]}}}