{ "id": "CVE-2025-13836", "sourceIdentifier": "cna@python.org", "published": "2025-12-01T18:16:04.200", "lastModified": "2026-09-03T03:15:20.653", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [ { "lang": "en", "value": "When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length. This allows a malicious server to cause the client to read large amounts of data into memory, potentially causing OOM or other DoS." }, { "lang": "es", "value": "Al leer una respuesta HTTP de un servidor, si no se especifica una cantidad de lectura, el comportamiento predeterminado ser\u00e1 usar Content-Length. Esto permite a un servidor malicioso hacer que el cliente lea grandes cantidades de datos en la memoria, lo que podr\u00eda causar OOM u otro DoS." } ], "affected": [ { "source": "cna@python.org", "affectedData": [ { "vendor": "Python Software Foundation", "product": "CPython", "defaultStatus": "unaffected", "modules": [ "http.client" ], "repo": "https://github.com/python/cpython", "versions": [ { "version": "0", "lessThan": "3.10.20", "versionType": "python", "status": "affected" }, { "version": "3.11.0", "lessThan": "3.11.15", "versionType": "python", "status": "affected" }, { "version": "3.12.0", "lessThan": "3.12.13", "versionType": "python", "status": "affected" }, { "version": "3.13.0", "lessThan": "3.13.11", "versionType": "python", "status": "affected" }, { "version": "3.14.0", "lessThan": "3.14.1", "versionType": "python", "status": "affected" }, { "version": "3.15.0a1", "lessThan": "3.15.0a3", "versionType": "python", "status": "affected" } ] } ] } ], "metrics": { 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"NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED" } } ], "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH" }, "exploitabilityScore": 3.9, "impactScore": 3.6 } ], "ssvcV203": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": { "timestamp": "2025-12-01T18:32:37.506031Z", "id": "CVE-2025-13836", "options": [ { "exploitation": "none" }, { "automatable": "no" }, { "technicalImpact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } ] }, "weaknesses": [ { "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [ { "lang": "en", "value": "CWE-400" } ] } ], "configurations": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.10.20", "matchCriteriaId": "1F853468-5391-4279-B369-E480A2B91D6C" }, { "vulnerable": true, "criteria": "cpe:2.3:a:python:python:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.11.0", "versionEndExcluding": "3.11.15", "matchCriteriaId": "7B38F8DA-DD8F-4887-AC85-CE843E21AD74" }, { "vulnerable": true, "criteria": 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"https://github.com/python/cpython/commit/289f29b0fe38baf2d7cb5854f4bb573cc34a6a15", "source": "cna@python.org", "tags": [ "Patch" ] }, { "url": "https://github.com/python/cpython/commit/4ce27904b597c77d74dd93f2c912676021a99155", "source": "cna@python.org", "tags": [ "Patch" ] }, { "url": "https://github.com/python/cpython/commit/5a4c4a033a4a54481be6870aa1896fad732555b5", "source": "cna@python.org", "tags": [ "Patch" ] }, { "url": "https://github.com/python/cpython/commit/5dc101675fd22918facbbe0fecdc821502beaaf0", "source": "cna@python.org", "tags": [ "Patch" ] }, { "url": "https://github.com/python/cpython/commit/afc40bdd3dd71f343fd9016f6d8eebbacbd6587c", "source": "cna@python.org", "tags": [ "Patch" ] }, { "url": "https://github.com/python/cpython/issues/119451", "source": "cna@python.org", "tags": [ "Issue Tracking", "Patch" ] }, { "url": "https://github.com/python/cpython/pull/119454", "source": "cna@python.org", "tags": [ "Issue Tracking", "Patch" ] }, { "url": "https://mail.python.org/archives/list/security-announce@python.org/thread/OQ6G7MKRQIS3OAREC3HNG3D2DPOU34XO/", "source": "cna@python.org", "tags": [ "Vendor Advisory" ] } ] }