{"schema_version":"1.9.0","id":"GHSA-892m-gcq8-2468","published":"2026-08-23T15:33:06Z","modified":"2026-08-26T01:18:21.769938467Z","withdrawn":"2026-08-25T16:40:27Z","summary":"Duplicate Advisory: Uncontrolled recursion DoS in JustHTML() via deeply nested HTML","details":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-v7cf-c9rm-wm3j. This link is maintained to preserve external references.\n\n### Original Description\njusthtml through 1.9.1 (fixed in 1.10.0) is vulnerable to uncontrolled recursion leading to denial of service. During JustHTML() construction, TreeBuilder.finish() unconditionally calls _populate_selectedcontent(), which recursively traverses the DOM tree via _find_elements()/_find_element() without a depth bound. An attacker who can supply HTML for parsing can provide deeply nested elements (e.g., ~1000 nested <div> tags, roughly 11 KB) to exceed CPython's default recursion limit and trigger an unhandled RecursionError, which may abort parsing, fail requests, or terminate a worker/process depending on the host application's exception handling.","affected":[{"package":{"name":"justhtml","ecosystem":"PyPI","purl":"pkg:pypi/justhtml"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.9.1"}]}],"versions":["0.1.0","0.10.0","0.11.0","0.12.0","0.13.0","0.13.1","0.14.0","0.15.0","0.16.0","0.17.0","0.18.0","0.19.0","0.2.0","0.20.0","0.21.0","0.22.0","0.23.0","0.24.0","0.25.0","0.26.0","0.27.0","0.28.0","0.29.0","0.3.0","0.30.0","0.31.0","0.32.0","0.33.0","0.34.0","0.35.0","0.36.0","0.37.0","0.38.0","0.39.0","0.4.0","0.40.0","0.5.0","0.5.1","0.5.2","0.6.0","0.7.0","0.8.0","0.9.0","1.0.0","1.1.0","1.2.0","1.3.0","1.4.0","1.5.0","1.6.0","1.7.0","1.8.0","1.9.0","1.9.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-892m-gcq8-2468/GHSA-892m-gcq8-2468.json"}}],"references":[{"type":"WEB","url":"https://github.com/EmilStenstrom/justhtml/security/advisories/GHSA-v7cf-c9rm-wm3j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9769"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/justhtml-before-denial-of-service-via-deeply-nested-html"}],"database_specific":{"cwe_ids":["CWE-674"],"github_reviewed":true,"github_reviewed_at":"2026-08-25T16:40:27Z","nvd_published_at":"2026-08-23T14:16:55Z","severity":"HIGH"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"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"}]}