{"cve":"CVE-2026-14534","nvd":{"published":"2026-07-04T14:16:28.400","modified":"2026-10-25T15:10:00.147","status":"Analyzed","description":"Trail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules _posixsubprocess, site, and atexit in the UNSAFE_IMPORTS denylist (fickle.py). Because these modules are absent from the denylist, fickling's check_safety() function returns LIKELY_SAFE with zero findings for pickle payloads that invoke dangerous functions including _posixsubprocess.fork_exec (C-level process spawner capable of executing arbitrary binaries), site.execsitecustomize (executes arbitrary site customization code), and atexit._run_exitfuncs (triggers all registered exit handler callbacks). The fickling.load() API chains check_safety() into pickle.loads() as an explicit security gate; a LIKELY_SAFE verdict causes the payload to be deserialized and executed. This shares the same root cause as CVE-2026-22607 (cProfile), CVE-2025-67748 (pty), and CVE-2025-67747 (marshal/types). OvertlyBadEvals does not flag these modules because they are standard library imports. UnsafeImports does not flag them because they are not in the denylist. The UnusedVariables heuristic is defeated by the SETITEMS opcode pattern.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-184","CWE-502"],"references":["https://github.com/trailofbits/fickling/commit/e8408615b63adf034f891f653692ab9b51f0f5af","https://github.com/trailofbits/fickling/pull/272","https://github.com/trailofbits/fickling/releases/tag/v0.1.11","https://github.com/trailofbits/fickling/security/advisories/GHSA-m6fh-58r7-x697","https://github.com/trailofbits/fickling/security/advisories/GHSA-m6fh-58r7-x697"],"products":["trailofbits:fickling"],"source":"nvd","synced_at":"2026-10-25T17:50:06.907763985+00:00"},"epss":{"cve":"CVE-2026-14534","score":0.00594,"percentile":0.48111,"date":"2026-10-25"},"kev":null,"osv":[{"id":"PYSEC-2026-2149","url":"https://osv.dev/vulnerability/PYSEC-2026-2149","summary":"","modified":"2026-07-13T07:15:25.024533172Z","packages":[{"ecosystem":"PyPI","name":"fickling","purl":"pkg:pypi/fickling","ranges":["<0.1.11"],"fixed":["0.1.11"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}