{"id":"CVE-2026-55585","summary":"QWED: Authenticated Remote Code Execution via Unsafe SymPy `parse_expr()`","details":"QWED is open-source AI verification infrastructure for deterministic verification of LLM outputs, tool calls, code, schemas, and agent state before production execution. Prior to 5.1.2, the qwed package passes caller-controlled math expressions directly to SymPy parse_expr() without restricted global_dict and local_dict namespaces, allowing Python eval() to resolve builtins and execute arbitrary Python code in the API server process. In src/qwed_new/api/main.py, POST /verify/math is protected by get_current_tenant but accepts any valid tenant API key, reads the expression field, applies only a cosmetic re.sub(r'(\\d)(()', r'\\1*\\2', expression) normalization, and passes the result to parse_expr(). In src/qwed_new/core/batch.py, POST /verify/batch sends math items through batch_service.create_job(), stores item.query verbatim, and _verify_item() passes VerificationType.MATH input to parse_expr() without sanitization. The default-enabled POST /auth/signup endpoint allows anyone to create a standard tenant account, POST /auth/api-keys issues an x-api-key, and either vulnerable path can then be used to read or write files, modify data, execute operating system commands, terminate the service, and compromise other tenants in a shared deployment. This issue is fixed in version 5.1.2.","aliases":["GHSA-q27q-98j4-9pfv"],"modified":"2026-08-30T03:31:01.230732322Z","published":"2026-08-25T16:23:39.334Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55585.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"5.1.2"}]},{"source":"DESCRIPTION","extracted_events":[{"fixed":"batch_service.create_job"}]}],"cna_assigner":"GitHub_M","cwe_ids":["CWE-94"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55585.json"},{"type":"ADVISORY","url":"https://github.com/QWED-AI/qwed-verification/security/advisories/GHSA-q27q-98j4-9pfv"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55585"},{"type":"FIX","url":"https://github.com/QWED-AI/qwed-verification/commit/6066b68c0c4f4cc2c3771824822aaa864d082ef8"},{"type":"FIX","url":"https://github.com/QWED-AI/qwed-verification/commit/dc9d4db72ca4b4ae3f96d0e6a0c27a9e38a06f61"},{"type":"FIX","url":"https://github.com/QWED-AI/qwed-verification/pull/200"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/qwed-ai/qwed-verification","events":[{"introduced":"0"},{"fixed":"6066b68c0c4f4cc2c3771824822aaa864d082ef8"},{"fixed":"dc9d4db72ca4b4ae3f96d0e6a0c27a9e38a06f61"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v5.1.1","v5.1.0","v5.0.0","v4.0.1","v4.0.0","v3.0.1","v3.0","v2.4.1","v2.4.0","v2.3.1","v2.3.0","v2.1.0","v2.0.1","v1.1.0","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55585.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}