{"id":"BIT-libpython-2026-15308","summary":"Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations","details":"The incremental HTML parser (html.parser.HTMLParser) allows for CPU\ndenial-of-service through repeated unterminated markup declarations when\nprocessing uncontrolled data.","aliases":["BIT-python-2026-15308","BIT-python-min-2026-15308","CVE-2026-15308","PSF-2026-33"],"modified":"2026-09-08T08:48:09.136792048Z","published":"2026-08-19T11:37:41.302Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"]},"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2026/07/09/4"},{"type":"FIX","url":"https://github.com/python/cpython/commit/07efb08123ba9367a7107325adb9d5626dca1ca9"},{"type":"FIX","url":"https://github.com/python/cpython/commit/1e7956f1a722df9aabc509c30f8fbdc3a2b4fdc7"},{"type":"FIX","url":"https://github.com/python/cpython/commit/785df8f743800661961528970f8598edcd291c14"},{"type":"FIX","url":"https://github.com/python/cpython/commit/7933f4bf7131aa4140750f9404f5de0aa2969ced"},{"type":"FIX","url":"https://github.com/python/cpython/commit/bcf98ddbc40ec9b3ee87da0124a5660b19b7e606"},{"type":"FIX","url":"https://github.com/python/cpython/commit/c2390b9376e35a701ed3acc597b8fc87546c9b00"},{"type":"FIX","url":"https://github.com/python/cpython/commit/e9f92ac0b298292e7ff998e52cb8ccacfb27a0bd"},{"type":"FIX","url":"https://github.com/python/cpython/issues/153030"},{"type":"FIX","url":"https://github.com/python/cpython/pull/153031"},{"type":"DISCUSSION","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/F6453LWKSHKCTWFLCOURWPLETNUIW2Z5/"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15308"}],"affected":[{"package":{"name":"libpython","ecosystem":"Bitnami","purl":"pkg:bitnami/libpython"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.10.21"},{"introduced":"3.11.0"},{"fixed":"3.11.16"},{"introduced":"3.12.0"},{"fixed":"3.12.14"},{"introduced":"3.13.0"},{"fixed":"3.13.15"},{"introduced":"3.14.0"},{"fixed":"3.14.7"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/libpython/BIT-libpython-2026-15308.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}