{"id":"BIT-libpython-2025-13836","summary":"Excessive read buffering DoS in http.client","details":"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.","aliases":["BIT-python-2025-13836","BIT-python-min-2025-13836","CVE-2025-13836","PSF-2025-14"],"modified":"2026-09-10T16:01:16.944812473Z","published":"2026-05-11T17:31:39.823Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"]},"references":[{"type":"FIX","url":"https://github.com/python/cpython/commit/14b1fdb0a94b96f86fc7b86671ea9582b8676628"},{"type":"FIX","url":"https://github.com/python/cpython/commit/289f29b0fe38baf2d7cb5854f4bb573cc34a6a15"},{"type":"FIX","url":"https://github.com/python/cpython/commit/4ce27904b597c77d74dd93f2c912676021a99155"},{"type":"FIX","url":"https://github.com/python/cpython/commit/5a4c4a033a4a54481be6870aa1896fad732555b5"},{"type":"FIX","url":"https://github.com/python/cpython/commit/5dc101675fd22918facbbe0fecdc821502beaaf0"},{"type":"FIX","url":"https://github.com/python/cpython/commit/afc40bdd3dd71f343fd9016f6d8eebbacbd6587c"},{"type":"FIX","url":"https://github.com/python/cpython/issues/119451"},{"type":"FIX","url":"https://github.com/python/cpython/pull/119454"},{"type":"ADVISORY","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/OQ6G7MKRQIS3OAREC3HNG3D2DPOU34XO/"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-13836"}],"affected":[{"package":{"name":"libpython","ecosystem":"Bitnami","purl":"pkg:bitnami/libpython"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.10.20"},{"introduced":"3.11.0"},{"fixed":"3.11.15"},{"introduced":"3.12.0"},{"fixed":"3.12.13"},{"introduced":"3.13.0"},{"fixed":"3.13.11"},{"introduced":"3.14.0"},{"fixed":"3.14.1"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/libpython/BIT-libpython-2025-13836.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"schema_version":"1.9.0"}