{"id":"CVE-2026-44209","aliases":["GHSA-gphh-9q3h-jgpp","PYSEC-2026-2390"],"url":"https://o3.security/vulnerability/CVE-2026-44209","summary":"Banks: Critical Remote Code Execution (RCE) via Jinja2 SSTI","details":"Banks generates meaningful LLM prompts using a template language that makes sense. Prior to 2.4.2, banks uses jinja2.Environment() (unsandboxed) to render prompt templates. Applications that pass user-supplied strings as the template argument to Prompt() are vulnerable to Server-Side Template Injection (SSTI), which can lead to Remote Code Execution (RCE) on the host system. This vulnerability is fixed in 2.4.2.","published":"2026-05-26T20:46:56.002Z","modified":"2026-08-07T11:31:11.402459380Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"banks","fixedVersion":"2.4.2"}],"fix":{"url":"https://github.com/masci/banks/pull/74","label":"masci/banks#74"},"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44209.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-44209"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44209.json"},{"type":"ADVISORY","url":"https://github.com/masci/banks/security/advisories/GHSA-gphh-9q3h-jgpp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44209"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2481713"},{"type":"FIX","url":"https://github.com/masci/banks/pull/74"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:31:11.402459380Z"}}