{"id":"CVE-2025-56005","aliases":["DEBIAN-CVE-2025-56005","EUVD-2026-3342","GHSA-qc6m-pwr3-g72p","MGASA-2026-0079","OESA-2026-1481","OESA-2026-1594","OESA-2026-1595","OESA-2026-1596","OESA-2026-1597","UBUNTU-CVE-2025-56005","openSUSE-SU-2026:10418-1"],"status":"disputed","title":"An undocumented and unsafe feature in the PLY (Python Lex-Yacc) library 3.11 allows Remote Code...","description":"An 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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-08","score":0.18807,"percentile":0.973,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-502"],"published":"2026-01-20T00:00:00Z","modified":"2026-10-28T02:30:43Z","exploits":[{"source":"pocgithub","id":"gdfurr98/ply-cve-2025-56005-lab","title":"gdfurr98/ply-cve-2025-56005-lab","date":"2026-09-27","url":"https://github.com/gdfurr98/ply-cve-2025-56005-lab"},{"source":"pocgithub","id":"gdfurr98/ply-safepickle","title":"gdfurr98/ply-safepickle","date":"2026-09-27","url":"https://github.com/gdfurr98/ply-safepickle"},{"source":"pocgithub","id":"tom025/ply_exploit_rejection","title":"tom025/ply_exploit_rejection","date":"2026-01-27","url":"https://github.com/tom025/ply_exploit_rejection"}],"fixes":[{"ecosystem":"Mageia:9","package":"python-ply","fixed_in":["3.11-8.1.mga9"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP3","package":"python-ply","fixed_in":["3.11-4.oe2403sp3"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP4","package":"python-ply","fixed_in":["3.11-4.oe2203sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS","package":"python-ply","fixed_in":["3.11-4.oe2403"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"python-ply","fixed_in":["3.11-4.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP2","package":"python-ply","fixed_in":["3.11-4.oe2403sp2"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"python-jsonpath-ng","fixed_in":["1.8.0-1.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11-10","3.11-11","3.11-12","3.11-5","3.11-6","3.11-7","3.11-8","3.11-9"]},{"source":"osv","ecosystem":"Debian:13","package":"ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11-10","3.11-11","3.11-12","3.11-9"]},{"source":"osv","ecosystem":"Debian:14","package":"ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11-10","3.11-11","3.11-12","3.11-9"]},{"source":"osv","ecosystem":"Mageia:9","package":"python-ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11-8.1.mga9"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP3","package":"python-ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11-4.oe2403sp3"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"python-ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11-4.oe2203sp4"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS","package":"python-ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11-4.oe2403"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"python-ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11-4.oe2403sp1"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP2","package":"python-ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11-4.oe2403sp2"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.9-1","3.11-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11-3","3.11-3build1","3.11-3ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11-4ubuntu1","3.11-5"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11-5","3.11-6"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"ply","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11-9"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"python-jsonpath-ng","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.0-1.1"}]}]}],"products":[{"vendor":"dabeaz","product":"ply"},{"vendor":"red hat","product":"fence agents remediation operator"},{"vendor":"red hat","product":"migration toolkit for containers"},{"vendor":"red hat","product":"migration toolkit for virtualization"},{"vendor":"red hat","product":"openshift developer tools and services"},{"vendor":"red hat","product":"openshift pipelines"},{"vendor":"red hat","product":"openshift service mesh 2"},{"vendor":"red hat","product":"openshift service mesh 3"},{"vendor":"red hat","product":"red hat advanced cluster security 4"},{"vendor":"red hat","product":"red hat ansible automation platform ansible core 2"},{"vendor":"red hat","product":"red hat ceph storage 7"},{"vendor":"red hat","product":"red hat ceph storage 8"},{"vendor":"red hat","product":"red hat certification program for red hat enterprise linux 9"},{"vendor":"red hat","product":"red hat directory server 13"},{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"},{"vendor":"red hat","product":"red hat enterprise linux ai (rhel ai) 3"},{"vendor":"red hat","product":"red hat openshift container platform 4"},{"vendor":"red hat","product":"red hat openshift data foundation 4"},{"vendor":"red hat","product":"red hat openshift gitops"},{"vendor":"red hat","product":"red hat openstack platform 13 (queens)"},{"vendor":"red hat","product":"red hat openstack platform 16.2"},{"vendor":"red hat","product":"red hat openstack platform 17.1"},{"vendor":"red hat","product":"red hat openstack platform 18.0"},{"vendor":"red hat","product":"red hat quay 3"},{"vendor":"red hat","product":"service telemetry framework 1.5"}],"references":[{"url":"https://github.com/bohmiiidd/Undocumented-RCE-in-PLY","tags":["Exploit","Third Party Advisory","package","report"]},{"url":"https://github.com/tom025/ply_exploit_rejection","tags":["Exploit","Mitigation","Third Party Advisory","package"]},{"url":"https://github.com/bohmiiidd/Undocumument_RCE_PLY-yacc-CVE-2025-56005","tags":["Exploit","Third Party Advisory","package"]},{"url":"https://github.com/tom025/ply_exploit_rejection/issues/1","tags":["report"]},{"url":"http://www.openwall.com/lists/oss-security/2026/01/23/4","tags":["Exploit","Mailing List","web"]},{"url":"http://www.openwall.com/lists/oss-security/2026/01/23/5","tags":["Mailing List","web"]},{"url":"http://www.openwall.com/lists/oss-security/2026/01/28/5","tags":["Exploit","Mailing List","web"]},{"url":"http://www.openwall.com/lists/oss-security/2026/01/29/1","tags":["Exploit","Mailing List","web"]},{"url":"http://www.openwall.com/lists/oss-security/2026/01/29/2","tags":["Mailing List","web"]},{"url":"http://www.openwall.com/lists/oss-security/2026/01/30/1","tags":["web"]},{"url":"https://access.redhat.com/security/cve/CVE-2025-56005","tags":["vdb-entry","x_refsource_REDHAT","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2431308","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-56005.json","tags":["x_sadp-csaf-vex","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-56005","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-qc6m-pwr3-g72p"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/56xxx/CVE-2025-56005.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-56005","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0079.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35294","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DHEPCPZY7AYJOCFYA65AKYXVQ5H5GOMT/","tags":["web"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1481","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1594","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1595","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1596","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1597","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-56005","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-56005","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2025-56005","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2025-56005","description":"An 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.","status":"disputed","published":"2026-01-20T00:00:00Z","modified":"2026-09-17T12:04:32.797Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-502","CWE-502"],"updated_at":"2026-11-02T14:32:26.64278Z"}],"euvd":[{"id":"EUVD-2026-3342","description":"An 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.","status":"published","published":"2026-01-20T00:00:00Z","modified":"2026-09-17T12:04:32Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T17:28:13.536818Z"}],"ghsa":[{"id":"GHSA-qc6m-pwr3-g72p","title":"An undocumented and unsafe feature in the PLY (Python Lex-Yacc) library 3.11 allows Remote Code...","description":"An 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.","status":"published","published":"2026-01-20T21:31:34Z","modified":"2026-06-30T03:35:27Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T15:09:04.017394Z"}],"nvd":[{"id":"CVE-2025-56005","description":"An 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.","status":"disputed","published":"2026-01-20T19:15:49.247Z","modified":"2026-09-17T12:17:09.87Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-502"],"updated_at":"2026-11-02T14:11:57.915063Z"}],"osv":[{"id":"CVE-2025-56005","description":"An 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.","status":"published","published":"2026-01-20T00:00:00Z","modified":"2026-10-28T02:30:43.025742861Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:51.190588Z"},{"id":"DEBIAN-CVE-2025-56005","description":"An 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.","status":"published","published":"2026-01-20T19:15:49.247Z","modified":"2026-09-18T08:47:25.525439247Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:47.697959Z"},{"id":"OESA-2026-1481","title":"python-ply security update","description":"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)","status":"published","published":"2026-02-28T11:10:29Z","modified":"2026-08-18T01:19:35.331764843Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:45.721983Z"},{"id":"OESA-2026-1594","title":"python-ply security update","description":"/ply/\n/ply--*.egg-info/\r\n\r\n\nSecurity 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)","status":"published","published":"2026-03-15T11:10:35Z","modified":"2026-08-18T01:19:38.006140161Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:45.721983Z"},{"id":"OESA-2026-1595","title":"python-ply security update","description":"/ply/\n/ply--*.egg-info/\r\n\r\n\nSecurity 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)","status":"published","published":"2026-03-15T11:10:36Z","modified":"2026-08-18T01:19:37.763050168Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:45.721983Z"},{"id":"OESA-2026-1596","title":"python-ply security update","description":"/ply/\n/ply--*.egg-info/\r\n\r\n\nSecurity 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)","status":"published","published":"2026-03-15T11:10:36Z","modified":"2026-08-18T01:19:38.03824293Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:45.721983Z"},{"id":"OESA-2026-1597","title":"python-ply security update","description":"/ply/\n/ply--*.egg-info/\r\n\r\n\nSecurity 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)","status":"published","published":"2026-03-15T11:10:36Z","modified":"2026-08-18T01:19:37.990734627Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:45.721983Z"},{"id":"UBUNTU-CVE-2025-56005","description":"An 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.","status":"published","published":"2026-01-20T19:15:00Z","modified":"2026-06-30T18:15:45.962232225Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:55:50.817402Z"},{"id":"MGASA-2026-0079","title":"Updated python-ply packages fix security vulnerability","description":"Unsafe pickle file handling in Ply. (CVE-2025-56005)\n","status":"published","published":"2026-03-31T23:05:51Z","modified":"2026-04-16T04:41:16.762392595Z","updated_at":"2026-11-02T15:49:43.178336Z"},{"id":"openSUSE-SU-2026:10418-1","title":"python311-jsonpath-ng-1.8.0-1.1 on GA media","description":"These are all security issues fixed in the python311-jsonpath-ng-1.8.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-03-24T00:00:00Z","modified":"2026-03-25T08:31:45.954003Z","updated_at":"2026-11-02T16:58:38.415593Z"}]}}