{"schema_version":"1.7.2","id":"OESA-2026-1481","modified":"2026-08-06T11:10:29Z","published":"2026-02-28T11:10:29Z","upstream":["CVE-2025-56005"],"summary":"python-ply security update","details":"Security Fix(es):\n\nAn undocumented and unsafe feature in the PLY (Python Lex-Yacc) library 3.11 allows Remote Code Execution (RCE) via the `picklefile` parameter in the `yacc()` function. This parameter accepts a `.pkl` file that is deserialized with `pickle.load()` without validation. Because `pickle` allows execution of embedded code via `__reduce__()`, an attacker can achieve code execution by passing a malicious pickle file. The parameter is not mentioned in official documentation or the GitHub repository, yet it is active in the PyPI version. This introduces a stealthy backdoor and persistence risk. NOTE: A third-party states that this vulnerability should be rejected because the proof of concept does not demonstrate arbitrary code execution and fails to complete successfully.(CVE-2025-56005)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"python-ply","purl":"pkg:rpm/openEuler/python-ply&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11-4.oe2403sp3"}]}],"ecosystem_specific":{"noarch":["python-ply-help-3.11-4.oe2403sp3.noarch.rpm","python3-ply-3.11-4.oe2403sp3.noarch.rpm"],"src":["python-ply-3.11-4.oe2403sp3.src.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1481"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-56005"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}],"database_specific":{"severity":"Critical"}}