CVE-2026-55585 (GCVE-0-2026-55585)

Vulnerability from cvelistv5 – Published: 2026-08-25 16:23 – Updated: 2026-08-25 16:23
VLAI
Title
QWED: Authenticated Remote Code Execution via Unsafe SymPy `parse_expr()`
Summary
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.
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Impacted products
Vendor Product Version CPE status
QWED-AI qwed-verification Affected: < 5.1.2
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "qwed-verification",
          "vendor": "QWED-AI",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.1.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027(\\d)(()\u0027, r\u0027\\1*\\2\u0027, 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-25T16:23:39.334Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/QWED-AI/qwed-verification/security/advisories/GHSA-q27q-98j4-9pfv",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/QWED-AI/qwed-verification/security/advisories/GHSA-q27q-98j4-9pfv"
        },
        {
          "name": "https://github.com/QWED-AI/qwed-verification/pull/200",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/QWED-AI/qwed-verification/pull/200"
        },
        {
          "name": "https://github.com/QWED-AI/qwed-verification/commit/6066b68c0c4f4cc2c3771824822aaa864d082ef8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/QWED-AI/qwed-verification/commit/6066b68c0c4f4cc2c3771824822aaa864d082ef8"
        },
        {
          "name": "https://github.com/QWED-AI/qwed-verification/commit/dc9d4db72ca4b4ae3f96d0e6a0c27a9e38a06f61",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/QWED-AI/qwed-verification/commit/dc9d4db72ca4b4ae3f96d0e6a0c27a9e38a06f61"
        }
      ],
      "source": {
        "advisory": "GHSA-q27q-98j4-9pfv",
        "discovery": "UNKNOWN"
      },
      "title": "QWED: Authenticated Remote Code Execution via Unsafe SymPy `parse_expr()`"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-55585",
    "datePublished": "2026-08-25T16:23:39.334Z",
    "dateReserved": "2026-06-16T23:18:03.169Z",
    "dateUpdated": "2026-08-25T16:23:39.334Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-55585",
      "date": "2026-08-27",
      "epss": "0.00444",
      "percentile": "0.36962"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-55585\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-08-25T17:17:32.903\",\"lastModified\":\"2026-08-25T17:17:32.903\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\u0027(\\\\d)(()\u0027, r\u0027\\\\1*\\\\2\u0027, 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.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"QWED-AI\",\"product\":\"qwed-verification\",\"versions\":[{\"version\":\"\u003c 5.1.2\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-94\"}]}],\"references\":[{\"url\":\"https://github.com/QWED-AI/qwed-verification/commit/6066b68c0c4f4cc2c3771824822aaa864d082ef8\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/QWED-AI/qwed-verification/commit/dc9d4db72ca4b4ae3f96d0e6a0c27a9e38a06f61\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/QWED-AI/qwed-verification/pull/200\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/QWED-AI/qwed-verification/security/advisories/GHSA-q27q-98j4-9pfv\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}



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