{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2017-20285", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-09-21T21:18:28.499Z", "datePublished": "2026-10-05T06:49:17.583Z", "dateUpdated": "2026-10-05T18:10:18.203Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "modules": ["YAML"], "packageName": "YAML", "packageURL": "pkg:cpan/YAML", "programFiles": ["lib/YAML.pm", "lib/YAML/Loader.pm", "lib/YAML/Types.pm"], "programRoutines": [{"name": "YAML::Loader::_parse_explicit"}, {"name": "YAML::Type::code::yaml_load"}, {"name": "YAML::Type::regexp::yaml_load"}], "repo": "https://github.com/ingydotnet/yaml-pm", "versions": [{"lessThan": "1.30", "status": "affected", "version": "0", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "YAML versions before 1.30 for Perl allow a loaded document to trigger the DESTROY method of arbitrary classes.\n\nA perl/hash:Class tag blesses a hash into the class it names. The document supplies the object's fields, and Perl calls DESTROY when it goes out of scope.\n\nWhat DESTROY does depends on the classes the process has loaded. With File::Temp::Dir from core Perl, it can delete a directory tree the document names."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-502", "description": "CWE-502 Deserialization of Untrusted Data", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-470", "description": "CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-10-05T06:49:17.583Z"}, "references": [{"tags": ["issue-tracking"], "url": "https://github.com/ingydotnet/yaml-pm/issues/176"}, {"tags": ["patch"], "url": "https://github.com/ingydotnet/yaml-pm/commit/471314bbdcbd62077eea32755929122aa8bd00a3.patch"}, {"tags": ["patch"], "url": "https://github.com/ingydotnet/yaml-pm/commit/7736f38bd02e4f9f77d5468721e3be3d7b34a8ec.patch"}, {"tags": ["release-notes"], "url": "https://metacpan.org/release/TINITA/YAML-1.30/changes"}], "solutions": [{"lang": "en", "value": "Upgrade to YAML 1.30 or later."}], "source": {"discovery": "UNKNOWN"}, "timeline": [{"lang": "en", "time": "2017-05-10T00:00:00.000Z", "value": "Issue reported."}, {"lang": "en", "time": "2018-05-11T00:00:00.000Z", "value": "Version 1.25 released with the $YAML::LoadBlessed option."}, {"lang": "en", "time": "2020-01-27T00:00:00.000Z", "value": "Version 1.30 released with the option defaulting to off."}, {"lang": "en", "time": "2022-06-27T00:00:00.000Z", "value": "Issue added as CPANSA-YAML-2017-01 in the CPAN::Audit database."}, {"lang": "en", "time": "2026-09-21T00:00:00.000Z", "value": "CVE number reserved."}], "title": "YAML versions before 1.30 for Perl allow a loaded document to trigger the DESTROY method of arbitrary classes", "workarounds": [{"lang": "en", "value": "For deployments that cannot upgrade to YAML 1.30, set $YAML::LoadBlessed = 0 before loading untrusted input. The option exists from YAML 1.25."}], "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/10/05/8"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-10-05T18:10:18.203Z"}}]}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "modules": ["YAML"], "packageName": "YAML", "packageURL": "pkg:cpan/YAML", "programFiles": ["lib/YAML.pm", "lib/YAML/Loader.pm", "lib/YAML/Types.pm"], "programRoutines": [{"name": "YAML::Loader::_parse_explicit"}, {"name": "YAML::Type::code::yaml_load"}, {"name": "YAML::Type::regexp::yaml_load"}], "repo": "https://github.com/ingydotnet/yaml-pm", "versions": [{"lessThan": "1.30", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "YAML versions before 1.30 for Perl allow a loaded document to trigger the DESTROY method of arbitrary classes.\n\nA perl/hash:Class tag blesses a hash into the class it names. The document supplies the object's fields, and Perl calls DESTROY when it goes out of scope.\n\nWhat DESTROY does depends on the classes the process has loaded. With File::Temp::Dir from core Perl, it can delete a directory tree the document names."}], "id": "CVE-2017-20285", "lastModified": "2026-10-05T19:17:10.910", "metrics": {}, "published": "2026-10-05T07:16:29.017", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/ingydotnet/yaml-pm/commit/471314bbdcbd62077eea32755929122aa8bd00a3.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/ingydotnet/yaml-pm/commit/7736f38bd02e4f9f77d5468721e3be3d7b34a8ec.patch"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://github.com/ingydotnet/yaml-pm/issues/176"}, {"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/TINITA/YAML-1.30/changes"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2026/10/05/8"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-470"}, {"lang": "en", "value": "CWE-502"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{"bugzilla": {"description": "perl-yaml: perl-yaml: Arbitrary destructor method execution via crafted YAML document", "id": "2545820", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2545820"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.4", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-502", "details": ["A flaw was found in perl-yaml. An attacker can trigger unintended actions, such as arbitrary file deletion, by supplying a specially crafted YAML document. The parser permits untrusted documents to instantiate arbitrary object classes, causing Perl to automatically execute their destructor methods when the objects are cleaned up."], "name": "CVE-2017-20285", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "perl-YAML", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Affected", "package_name": "perl-YAML", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "perl-YAML", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "perl-YAML:1.24/perl-YAML", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "perl-YAML", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-05T06:49:17Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-20285\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-20285\nhttps://github.com/ingydotnet/yaml-pm/commit/471314bbdcbd62077eea32755929122aa8bd00a3.patch\nhttps://github.com/ingydotnet/yaml-pm/commit/7736f38bd02e4f9f77d5468721e3be3d7b34a8ec.patch\nhttps://github.com/ingydotnet/yaml-pm/issues/176\nhttps://metacpan.org/release/TINITA/YAML-1.30/changes"], "threat_severity": "Important"}

{"created": "2026-10-05T08:30:04.718529+00:00", "updated": "2026-10-05T13:30:19.974086+00:00", "vendors": []}