{"id":"CVE-2026-45028","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-45028","generatedAt":"2026-10-28T02:22:59.603Z","title":"An attacker could replay one component's encrypted props (p) value as another component's slots (s) value, or vice versa.","description":"Astro is a web framework. Astro versions prior to 6.1.10 used AES-GCM encryption to protect the confidentiality and integrity of server island props and slots parameters, but did not bind the ciphertext to its intended component or parameter type. An attacker could replay one component's encrypted props (p) value as another component's slots (s) value, or vice versa. Since slots contain raw unescaped HTML while props may contain user-controlled values, this could lead to XSS in applications. This occurs when the application uses server islands, two different server island components share the same key name for a prop and a slot, and an attacker has full control over the value of the overlapping prop (requires a dynamically rendered page). This vulnerability is fixed in 6.1.10.","published":"2026-05-13T16:17:00.000Z","lastModified":"2026-10-26T17:10:03.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":2.9,"severity":"LOW","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-323","CWE-79"],"affected":["astro/astro"],"epss":{"score":0.00144,"percentile":0.03633,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/withastro/astro/commit/3d82220a1549e699e34ed433f3846a919f4c02bd","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/pull/16457","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/security/advisories/GHSA-xr5h-phrj-8vxv","tags":["Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45028","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."}