{"id":"CVE-2025-15265","aliases":["GHSA-6738-r8g5-qwp3"],"url":"https://o3.security/vulnerability/CVE-2025-15265","summary":"Svelte 5.46.0  - Hydratable Key Script-Breakout XSS (SSR)","details":"An SSR XSS exists in async hydration when attacker‑controlled keys are passed to hydratable. The key is embedded inside a <script> block without HTML‑safe escaping, allowing </script> to terminate the script and inject arbitrary JavaScript. This enables remote script execution in users' browsers, with potential for session theft and account compromise.\nThis issue affects Svelte: from 5.46.0 before 5.46.3.","published":"2026-01-15T19:59:41.683Z","modified":"2026-07-15T01:48:56.123555904Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"svelte","fixedVersion":"5.46.4"}],"fix":null,"references":[{"type":"WEB","url":"https://registry.npmjs.org"},{"type":"ADVISORY","url":"https://fluidattacks.com/advisories/lydian"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15265.json"},{"type":"ADVISORY","url":"https://github.com/sveltejs/svelte/security/advisories/GHSA-6738-r8g5-qwp3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-15265"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:48:56.123555904Z"}}