{"cve":"CVE-2026-114127","nvd":{"published":"2026-10-21T18:17:25.317","modified":"2026-10-22T17:21:57.293","status":"Awaiting Analysis","description":"Astro is a web framework for content-driven websites. From 7.1.0 until 7.3.3, Astro's server-side View Transition CSS generator does not keep string animation properties within their generated declarations. An application that passes attacker-controlled data into properties such as duration, delay, easing, direction, fillMode, or animation names can allow CSS delimiters to terminate the declaration and add attacker-selected rules to the server-rendered page. The generated stylesheet still escapes literal less-than characters, so the injected content cannot terminate the style element or directly inject HTML or JavaScript. The injected CSS can conceal or reposition content, add generated text, and otherwise misrepresent the interface; some applications may also expose data already present in selectable DOM attributes through conditional resource loads. This issue is fixed in 7.3.3.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","score":2.3},"cvss_v3":null,"cwes":["CWE-79"],"references":["https://github.com/withastro/astro/commit/0b4dc3a211910b589d3805ab4dfedf11b0e712bb","https://github.com/withastro/astro/pull/17970","https://github.com/withastro/astro/releases/tag/astro@7.3.3","https://github.com/withastro/astro/security/advisories/GHSA-mpr7-6m5w-76rw"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-114127","score":0.00394,"percentile":0.33357,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-mpr7-6m5w-76rw","url":"https://osv.dev/vulnerability/GHSA-mpr7-6m5w-76rw","summary":"Astro: Arbitrary CSS injection in Astro View Transitions","modified":"2026-10-22T16:45:03.723634874Z","packages":[{"ecosystem":"npm","name":"astro","purl":"pkg:npm/astro","ranges":[">=7.1.0 <7.3.3"],"fixed":["7.3.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}