{"id":"CVE-2026-78030","published":"2026-09-19T11:16:37.667","lastModified":"2026-09-22T19:07:00.983","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.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-470"],"vendors":[],"products":[],"references":[{"url":"https://github.com/perl5-dbi/dbi/commit/315c6ce703b8b3cbe9188062d9ec80730293554a.patch","tags":[]},{"url":"https://github.com/perl5-dbi/dbi/security/advisories/GHSA-wqmw-wqwx-3fr7","tags":[]},{"url":"https://metacpan.org/release/HMBRAND/DBI-1.653/changes","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/19/4","tags":[]}],"exploitRefs":[{"url":"https://github.com/perl5-dbi/dbi/commit/315c6ce703b8b3cbe9188062d9ec80730293554a.patch","tags":[]},{"url":"https://github.com/perl5-dbi/dbi/security/advisories/GHSA-wqmw-wqwx-3fr7","tags":[]}],"hasPoc":true,"ai":{"summary":"This flaw allows an attacker to load arbitrary Perl modules by manipulating unvalidated connect attributes, leading to potential remote code execution.","exploitability":"Exploitation is relatively easy if an attacker can influence the dbm_type or dbm_mldbm attributes, such as through a DSN fragment.","blast_radius":"If exploited, this could result in unauthorized execution of arbitrary code on the server, potentially leading to full system compromise.","remediation":"Upgrade to DBI version 1.653 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","perl","dbi","module-injection"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-27T09:00:15.069Z"}}