{"id":"CVE-2026-78030","state":"PUBLISHED","title":"DBI versions before 1.653 for Perl load arbitrary modules via unvalidated dbm_type and dbm_mldbm attributes in DBD::DBM","description":"DBI versions before 1.653 for Perl load arbitrary modules via unvalidated dbm_type and dbm_mldbm attributes in DBD::DBM.\n\nDBD::DBM passes the dbm_type and dbm_mldbm connect attributes to require without checking that the value names a module. require treats a path-shaped string as a literal filename and does not consult @INC, so the attribute chooses the file that Perl loads and runs.\n\nThe MLDBM::Serializer:: prefix that DBD::DBM prepends to dbm_mldbm is not a boundary: only the :: separators are rewritten to /, so a value containing / traverses out of the serializer directory. The value is also assigned to $MLDBM::Serializer, which MLDBM requires the same way when it ties the table.\n\nA caller that lets an untrusted party influence either attribute, for example through a DSN fragment or a parameter that selects a storage backend, runs the file-scope code of whatever module the value names.\n\nFor example,\n\n    my $dsn = \"dbi:DBM:f_dir=/var/db;dbm_type=../../Untrusted.pm\"\n    my $dbh = DBI->connect( $dsn );\n\nNote that DBD::Gofer forwards connect attributes to the server side, and DBI::ProxyServer checks only that a DSN starts with a driver prefix.","publishedAt":"2026-09-19T10:45:10.164Z","updatedAt":"2026-09-20T00:05:29.533Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"CPANSec","products":["DBI"],"affected":[{"packageName":"DBI","packageURL":"pkg:cpan/DBI","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.653","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","modules":["DBI"],"programFiles":["lib/DBD/DBM.pm"],"programRoutines":[{"name":"DBD::DBM::Table::init_table_meta"},{"name":"DBD::DBM::Table::open_data"},{"name":"DBD::DBM::db::get_dbm_versions"}],"repo":"https://github.com/perl5-dbi/dbi"}],"references":["https://metacpan.org/release/HMBRAND/DBI-1.653/changes","https://github.com/perl5-dbi/dbi/commit/315c6ce703b8b3cbe9188062d9ec80730293554a.patch","https://github.com/perl5-dbi/dbi/security/advisories/GHSA-wqmw-wqwx-3fr7","http://www.openwall.com/lists/oss-security/2026/09/19/4"],"weaknesses":["CWE-470"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/78xxx/CVE-2026-78030.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-78030","state":"PUBLISHED","datePublished":"2026-09-19T10:45:10.164Z","dateUpdated":"2026-09-20T00:05:29.533Z","assignerShortName":"CPANSec","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateReserved":"2026-08-22T00:39:23.300Z"},"containers":{"cna":{"title":"DBI versions before 1.653 for Perl load arbitrary modules via unvalidated dbm_type and dbm_mldbm attributes in DBD::DBM","descriptions":[{"lang":"en","value":"DBI versions before 1.653 for Perl load arbitrary modules via unvalidated dbm_type and dbm_mldbm attributes in DBD::DBM.\n\nDBD::DBM passes the dbm_type and dbm_mldbm connect attributes to require without checking that the value names a module. require treats a path-shaped string as a literal filename and does not consult @INC, so the attribute chooses the file that Perl loads and runs.\n\nThe MLDBM::Serializer:: prefix that DBD::DBM prepends to dbm_mldbm is not a boundary: only the :: separators are rewritten to /, so a value containing / traverses out of the serializer directory. The value is also assigned to $MLDBM::Serializer, which MLDBM requires the same way when it ties the table.\n\nA caller that lets an untrusted party influence either attribute, for example through a DSN fragment or a parameter that selects a storage backend, runs the file-scope code of whatever module the value names.\n\nFor example,\n\n    my $dsn = \"dbi:DBM:f_dir=/var/db;dbm_type=../../Untrusted.pm\"\n    my $dbh = DBI->connect( $dsn );\n\nNote that DBD::Gofer forwards connect attributes to the server side, and DBI::ProxyServer checks only that a DSN starts with a driver prefix."}],"affected":[{"packageName":"DBI","packageURL":"pkg:cpan/DBI","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.653","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","modules":["DBI"],"programFiles":["lib/DBD/DBM.pm"],"programRoutines":[{"name":"DBD::DBM::Table::init_table_meta"},{"name":"DBD::DBM::Table::open_data"},{"name":"DBD::DBM::db::get_dbm_versions"}],"repo":"https://github.com/perl5-dbi/dbi"}],"references":[{"url":"https://metacpan.org/release/HMBRAND/DBI-1.653/changes","tags":["release-notes"]},{"url":"https://github.com/perl5-dbi/dbi/commit/315c6ce703b8b3cbe9188062d9ec80730293554a.patch","tags":["patch"]},{"url":"https://github.com/perl5-dbi/dbi/security/advisories/GHSA-wqmw-wqwx-3fr7","tags":["vendor-advisory"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-470","description":"CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CPANSec","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateUpdated":"2026-09-19T10:45:10.164Z"},"credits":[{"lang":"en","type":"finder","value":"Harsh Raj Singhania"}],"solutions":[{"lang":"en","value":"Upgrade to DBI version 1.653 or later, or apply the upstream patch."}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/09/19/4"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-09-19T18:07:55.310Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-20T00:05:25.993244Z","id":"CVE-2026-78030","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-20T00:05:29.533Z"}}]}}}