{"id":"CVE-2026-34748","aliases":["GHSA-mmxc-95ch-2j7c"],"url":"https://o3.security/vulnerability/CVE-2026-34748","summary":"@payloadcms/next has Stored XSS in Admin Panel","details":"### Impact\n\nA stored Cross-site Scripting (XSS) vulnerability existed in the admin panel. An authenticated user with write access to a collection could save content that, when viewed by another user, would execute in their browser.\n\nConsumers are affected if ALL of these are true:\n\n- Payload version **< v3.78.0**\n- At least one collection with versions enabled\n- An authenticated user has `create` or `update` access to that collection\n\n### Patches\n\nThis vulnerability has been patched in **v3.78.0**. Output encoding has been added to prevent user-supplied content from being interpreted as markup.\n\nUsers should upgrade to **v3.78.0** or later.\n\n### Workarounds\n\nIf consumers cannot upgrade immediately:\n\n- Restrict `create` and `update` access to versioned collections to trusted roles only.","published":"2026-04-01T19:48:10.297Z","modified":"2026-08-12T03:51:14.421268245Z","cvss":{"score":8.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@payloadcms/next","fixedVersion":"3.78.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34748.json"},{"type":"ADVISORY","url":"https://github.com/payloadcms/payload/security/advisories/GHSA-mmxc-95ch-2j7c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34748"},{"type":"PACKAGE","url":"https://github.com/payloadcms/payload"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:14.421268245Z"}}