{"id":"CVE-2026-66858","title":"The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack","summary":"The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python pr…","severity":"high","cvss":8.7,"cvssVector":"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","cwe":["CWE-674"],"vendor":"Apache Software Foundation","product":"thrift","affected":["thrift < 0.25.0","apache/thrift < 0.25.0","Thrift < 0.25.0","Lua < 0.25.0","Smalltalk < 0.25.0","OCaml < 0.25.0"],"published":"2026-10-02","updated":"2026-10-02","sourceUpdated":"2026-10-02T13:17:53.453","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-66858","references":[{"url":"https://lists.apache.org/thread/33otcgbqd27wf6qq810q56znzbomnhg1","label":"security@apache.org"},{"url":"https://lists.apache.org/thread/6kl6g40tpl8zt3opd8fwn6bsgyddzhd5","label":"security@apache.org"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-10-02T13:19:14.160Z","slug":"CVE-2026-66858","body":"## Overview\n\nThe protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries.\n\n\n\nThis issue affects Apache Thrift: before 0.25.0.\n\n\n\nUsers are recommended to upgrade to version 0.25.0, which fixes the issue.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}