CVE-2026-32875

{"id": "CVE-2026-32875", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-32875", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-25T14:32:02.675720Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "ultrajson", "product": "ultrajson", "versions": [{"status": "affected", "version": ">= 5.1.0, < 5.12.0"}]}]}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "affectedData": [{"cpes": ["cpe:/a:redhat:openstack:16.2"], "vendor": "Red Hat", "product": "Red Hat OpenStack Platform 16.2", "packageName": "python-ujson", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:openstack:17.1"], "vendor": "Red Hat", "product": "Red Hat OpenStack Platform 17.1", "packageName": "python-ujson", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}, {"cpes": ["cpe:/a:redhat:openstack:18.0"], "vendor": "Red Hat", "product": "Red Hat OpenStack Platform 18.0", "packageName": "python-ujson", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "defaultStatus": "unaffected"}]}], "published": "2026-03-20T02:16:35.887", "references": [{"url": "https://github.com/ultrajson/ultrajson/commit/486bd4553dc471a1de11613bc7347a6b318e37ea", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ultrajson/ultrajson/issues/700", "tags": ["Issue Tracking"], "source": "security-advisories@github.com"}, {"url": "https://github.com/ultrajson/ultrajson/security/advisories/GHSA-c8rr-9gxc-jprv", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-32875", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2449400", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}, {"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32875.json", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-787"}, {"lang": "en", "value": "CWE-835"}]}, {"type": "Secondary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-190"}]}, {"type": "Secondary", "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "description": [{"lang": "en", "value": "CWE-190"}]}], "descriptions": [{"lang": "en", "value": "UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Versions 5.10 through 5.11.0 are vulnerable to buffer overflow or infinite loop through large indent handling. ujson.dumps() crashes the Python interpreter (segmentation fault) when the product of the indent parameter and the nested depth of the input exceeds INT32_MAX. It can also get stuck in an infinite loop if the indent is a large negative number. Both are caused by an integer overflow/underflow whilst calculating how much memory to reserve for indentation. And both can be used to achieve denial of service. To be vulnerable, a service must call ujson.dump()/ujson.dumps()/ujson.encode() whilst giving untrusted users control over the indent parameter and not restrict that indentation to reasonably small non-negative values. A service may also be vulnerable to the infinite loop if it uses a fixed negative indent. An underflow always occurs for any negative indent when the input data is at least one level nested but, for small negative indents, the underflow is usually accidentally rectified by another overflow. This issue has been fixed in version 5.12.0."}, {"lang": "es", "value": "UltraJSON es un codificador y decodificador JSON r\u00e1pido escrito en C puro con enlaces para Python 3.7+. Las versiones 5.10 a 5.11.0 son vulnerables a desbordamiento de b\u00fafer o bucle infinito a trav\u00e9s del manejo de sangr\u00edas grandes. ujson.dumps() bloquea el int\u00e9rprete de Python (fallo de segmentaci\u00f3n) cuando el producto del par\u00e1metro de sangr\u00eda y la profundidad anidada de la entrada excede INT32_MAX. Tambi\u00e9n puede quedarse atascado en un bucle infinito si la sangr\u00eda es un n\u00famero negativo grande. Ambos son causados por un desbordamiento/subdesbordamiento de entero mientras se calcula cu\u00e1nta memoria reservar para la sangr\u00eda. Y ambos pueden usarse para lograr denegaci\u00f3n de servicio. Para ser vulnerable, un servicio debe llamar a ujson.dump()/ujson.dumps()/ujson.encode() mientras otorga a usuarios no confiables control sobre el par\u00e1metro de sangr\u00eda y no restringe esa sangr\u00eda a valores no negativos razonablemente peque\u00f1os. Un servicio tambi\u00e9n puede ser vulnerable al bucle infinito si utiliza una sangr\u00eda negativa fija. Un subdesbordamiento siempre ocurre para cualquier sangr\u00eda negativa cuando los datos de entrada est\u00e1n anidados al menos un nivel pero, para sangr\u00edas negativas peque\u00f1as, el subdesbordamiento suele ser rectificado accidentalmente por otro desbordamiento. Este problema ha sido corregido en la versi\u00f3n 5.12.0."}], "lastModified": "2026-07-15T02:20:01.993", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ultrajson_project:ultrajson:*:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "578A106C-655C-400C-B5EA-1BF5BD497EDE", "versionEndExcluding": "5.12.0", "versionStartIncluding": "5.1.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}