{"id":"CVE-2026-103277","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-103277","generatedAt":"2026-10-28T02:58:53.476Z","title":"Ghost versions from 2.5.0 before 6.34.0 contain an untrusted script execution vulnerability in the oEmbed preview feature that fails to sandbox externally hosted scripts.","description":"Ghost versions from 2.5.0 before 6.34.0 contain an untrusted script execution vulnerability in the oEmbed preview feature that fails to sandbox externally hosted scripts. Attackers can craft malicious oEmbed content to execute scripts in the context of a staff user's admin session, potentially compromising administrative access.","published":"2026-10-01T11:17:23.000Z","lastModified":"2026-10-01T15:06:17.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":8.6,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-79"],"affected":[],"epss":{"score":0.00273,"percentile":0.19528,"date":"2026-10-26","history":[{"date":"2026-10-02","score":0.00273,"percentile":0.17895}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-01T11:17:23.000Z","detail":{"score":"8.6","severity":"HIGH","publishedAt":"2026-10-01T11:17:23.403Z"},"summary":"New CVE, high severity (CVSS 8.6)."}],"references":[{"url":"https://github.com/TryGhost/Ghost/security/advisories/GHSA-8vhf-xxpj-4qrg","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/ghost-2.5.0-before-6.34.0-untrusted-script-execution-via-oembed","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-103277","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}