{"id":"CVE-2025-71343","aliases":["GHSA-p9w7-82w4-7q8m"],"url":"https://o3.security/vulnerability/CVE-2025-71343","summary":"picklescan - Arbitrary Code Execution via lib2to3.pgen2.pgen.ParserGenerator.make_label Detection Bypass","details":"picklescan before 0.0.30 fails to detect malicious pickle files that exploit lib2to3.pgen2.pgen.ParserGenerator.make_label function in the reduce method. Attackers can craft malicious pickle files with embedded code that evades detection but executes arbitrary commands when pickle.load() is called.","published":"2026-07-04T01:23:32.430Z","modified":"2026-08-07T11:50:25.245936952Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"picklescan","fixedVersion":"0.0.30"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71343.json"},{"type":"ADVISORY","url":"https://github.com/mmaitre314/picklescan/security/advisories/GHSA-p9w7-82w4-7q8m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71343"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-lib2to3-pgen2-pgen-parsergenerator-make-label-detection-bypass"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:50:25.245936952Z"}}