{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55244", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T16:44:00.624Z", "datePublished": "2026-09-14T20:00:24.584Z", "dateUpdated": "2026-09-14T20:00:24.584Z"}, "containers": {"cna": {"title": "ASTEVAL: Sandbox Escape via BaseException Subclasses", "problemTypes": [{"descriptions": [{"cweId": "CWE-248", "lang": "en", "description": "CWE-248: Uncaught Exception", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/lmfit/asteval/security/advisories/GHSA-89v8-rhwq-hf77", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/lmfit/asteval/security/advisories/GHSA-89v8-rhwq-hf77"}, {"name": "https://github.com/lmfit/asteval/pull/153", "tags": ["x_refsource_MISC"], "url": "https://github.com/lmfit/asteval/pull/153"}, {"name": "https://github.com/lmfit/asteval/commit/9c625b3674f8d05f206708bb85afca17a87694a4", "tags": ["x_refsource_MISC"], "url": "https://github.com/lmfit/asteval/commit/9c625b3674f8d05f206708bb85afca17a87694a4"}, {"name": "https://github.com/lmfit/asteval/commit/c49c99a67acb63eb7410231932250bd820380e45", "tags": ["x_refsource_MISC"], "url": "https://github.com/lmfit/asteval/commit/c49c99a67acb63eb7410231932250bd820380e45"}, {"name": "https://github.com/lmfit/asteval/releases/tag/1.0.9", "tags": ["x_refsource_MISC"], "url": "https://github.com/lmfit/asteval/releases/tag/1.0.9"}], "affected": [{"vendor": "lmfit", "product": "asteval", "versions": [{"version": "< 1.0.9", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-14T20:00:24.584Z"}, "descriptions": [{"lang": "en", "value": "ASTEVAL is an evaluator of Python expressions and statements. Prior to 1.0.9, FROM_PY in asteval/astutils.py exposes BaseException, SystemExit, KeyboardInterrupt, and GeneratorExit to expressions evaluated by asteval.Interpreter.eval(), while run() and eval() in asteval/asteval.py catch Exception rather than these non-Exception BaseException subclasses. When an attacker-controlled expression raises one of these classes, on_raise() passes the class to raise_exception(), and the resulting exception bypasses the interpreter's safety handlers and propagates into the calling application. A consuming service that evaluates untrusted expressions can therefore be terminated or have signal and cleanup handling disrupted, causing denial of service. The separately documented read-only open() capability is not part of this vulnerability. This issue is fixed in version 1.0.9."}], "source": {"advisory": "GHSA-89v8-rhwq-hf77", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "asteval", "vendor": "lmfit", "versions": [{"status": "affected", "version": "< 1.0.9"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "ASTEVAL is an evaluator of Python expressions and statements. Prior to 1.0.9, FROM_PY in asteval/astutils.py exposes BaseException, SystemExit, KeyboardInterrupt, and GeneratorExit to expressions evaluated by asteval.Interpreter.eval(), while run() and eval() in asteval/asteval.py catch Exception rather than these non-Exception BaseException subclasses. When an attacker-controlled expression raises one of these classes, on_raise() passes the class to raise_exception(), and the resulting exception bypasses the interpreter's safety handlers and propagates into the calling application. A consuming service that evaluates untrusted expressions can therefore be terminated or have signal and cleanup handling disrupted, causing denial of service. The separately documented read-only open() capability is not part of this vulnerability. This issue is fixed in version 1.0.9."}], "id": "CVE-2026-55244", "lastModified": "2026-09-14T20:16:47.640", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.0, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.3, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-14T20:16:47.640", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/lmfit/asteval/commit/9c625b3674f8d05f206708bb85afca17a87694a4"}, {"source": "security-advisories@github.com", "url": "https://github.com/lmfit/asteval/commit/c49c99a67acb63eb7410231932250bd820380e45"}, {"source": "security-advisories@github.com", "url": "https://github.com/lmfit/asteval/pull/153"}, {"source": "security-advisories@github.com", "url": "https://github.com/lmfit/asteval/releases/tag/1.0.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/lmfit/asteval/security/advisories/GHSA-89v8-rhwq-hf77"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-248"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}