{"affected":[{"product":"fastapi-code-generator","source":"CNA: GitHub_M","vendor":"koxudaxi","versions":[{"status":"affected","version":"< 0.8.1"}]}],"cveId":"CVE-2026-63470","cwes":["CWE-94","CWE-116"],"description":"fastapi-code-generator creates FastAPI applications from OpenAPI files. Prior to 0.8.1, the generator inserts Operation.summary into a generated route-handler docstring as a triple-double-quoted string without escaping embedded triple quotes. An attacker-controlled or attacker-influenced operation summary can close the docstring and inject a valid Python expression statement into the handler body. Syntax-breaking input only causes generation to fail, but syntactically valid generated code executes with the server process's privileges when the affected route handler is called. This call-time route-handler docstring sink is distinct from the project's separate import-time route-path and additional-response-key sinks. This issue is fixed in version 0.8.1.","epss":null,"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/koxudaxi/fastapi-code-generator/security/advisories/GHSA-h667-4jj2-cgv4"}],"kev":null,"metrics":[{"score":9.3,"severity":"critical","source":"CNA: GitHub_M","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"}],"modifiedAt":1793734487499,"publishedAt":1793733227034,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/koxudaxi/fastapi-code-generator/security/advisories/GHSA-h667-4jj2-cgv4"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/koxudaxi/fastapi-code-generator/commit/49301dbdb82170d7f50877419d994b05cb1fa2bc"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/koxudaxi/fastapi-code-generator/commit/b3b9bd66e0b0c4d8c686fda700258104615a1332"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/koxudaxi/fastapi-code-generator/releases/tag/0.8.1"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/koxudaxi/fastapi-code-generator/security/advisories/GHSA-h667-4jj2-cgv4"}],"remediation":[],"revision":"b90d745425a5033fab39f79b926357ee068579f7e911aa34a8534783b4069685","sources":[{"modifiedAt":1793734487499,"name":"CNA: GitHub_M","retrievedAt":1793736597075,"url":"https://www.cve.org/CVERecord?id=CVE-2026-63470"}],"ssvc":{"assessedAt":1793734463694,"automatable":"yes","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"fastapi-code-generator: Call-time RCE via operation summary -> unescaped route-handler docstring","updatedAt":1793736597075}