{"id":"CVE-2025-59340","aliases":["GHSA-m49c-g9wr-hv6v"],"url":"https://o3.security/vulnerability/CVE-2025-59340","summary":"jinjava Sandbox Bypass via JavaType-Based Deserialization","details":"jinjava is a Java-based template engine based on django template syntax, adapted to render jinja templates. Priori to 2.8.1, by using mapper.getTypeFactory().constructFromCanonical(), it is possible to instruct the underlying ObjectMapper to deserialize attacker-controlled input into arbitrary classes. This enables the creation of semi-arbitrary class instances without directly invoking restricted methods or class literals. As a result, an attacker can escape the sandbox and instantiate classes such as java.net.URL, opening up the ability to access local files and URLs(e.g., file:///etc/passwd). With further chaining, this primitive can potentially lead to remote code execution (RCE). This vulnerability is fixed in 2.8.1.","published":"2025-09-17T20:01:55.788Z","modified":"2026-07-15T01:49:19.348643721Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"com.hubspot.jinjava:jinjava","fixedVersion":"2.8.1"},{"ecosystem":"Maven","name":"com.hubspot.jinjava:jinjava","fixedVersion":"2.7.5"}],"fix":{"url":"https://github.com/HubSpot/jinjava/commit/66df351e7e8ad71ca04dcacb4b65782af820b8b1","label":"HubSpot/jinjava@66df351"},"references":[{"type":"WEB","url":"https://github.com/HubSpot/jinjava/releases/tag/jinjava-2.8.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59340.json"},{"type":"ADVISORY","url":"https://github.com/HubSpot/jinjava/security/advisories/GHSA-m49c-g9wr-hv6v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-59340"},{"type":"FIX","url":"https://github.com/HubSpot/jinjava/commit/66df351e7e8ad71ca04dcacb4b65782af820b8b1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:19.348643721Z"}}