{"id":"CVE-2026-73194","state":"PUBLISHED","title":"DBI versions before 1.652 for Perl allow a heap out-of-bounds write via an unvalidated numeric placeholder that sets the binder counter in preparse","description":"DBI versions before 1.652 for Perl allow a heap out-of-bounds write via an unvalidated numeric placeholder that sets the binder counter in preparse.\n\npreparse reserves seven output bytes per input byte, the width of the longest ':p99999' expansion. The ':N' branch parses the number with `atoi(src)` and assigns it to the binder counter with no range check, so a statement containing ':2147483648' leaves the counter negative (-2147483648 with glibc, where atoi wraps). Each following '?' then expands through `sprintf(start, \":p%d\", idx++)` to ':p-2147483648', 14 bytes with the terminating NUL where the buffer budgets 7. The placeholder limit added in 1.650 tests the counter against 99,999, which a negative counter passes.\n\nAny caller that preparses an untrusted statement into ':pN' style placeholders gets a heap out-of-bounds write that grows with the number of '?' marks following the poisoned placeholder. The '?' and '%s' return styles compare the parsed number against the expected sequence and error out, and are unaffected.","publishedAt":"2026-08-15T12:09:22.962Z","updatedAt":"2026-08-17T20:29:56.764Z","severity":{"score":9.1,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","source":"CISA-ADP"},"assigner":"CPANSec","products":["DBI"],"affected":[{"packageName":"DBI","packageURL":"pkg:cpan/DBI","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.652","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","modules":["DBI"],"programFiles":["DBI.xs"],"programRoutines":[{"name":"preparse"}],"repo":"https://github.com/perl5-dbi/dbi"}],"references":["https://github.com/perl5-dbi/dbi/security/advisories/GHSA-623j-hfpc-mrc4","https://github.com/perl5-dbi/dbi/commit/29b72ae7d2a8114a734a55840bf1c45b89207809.patch","https://www.cve.org/CVERecord?id=CVE-2026-14739","https://www.cve.org/CVERecord?id=CVE-2026-10879"],"weaknesses":["CWE-1284","CWE-787"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73194.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73194","state":"PUBLISHED","datePublished":"2026-08-15T12:09:22.962Z","dateUpdated":"2026-08-17T20:29:56.764Z","assignerShortName":"CPANSec","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateReserved":"2026-08-11T11:58:19.137Z"},"containers":{"cna":{"title":"DBI versions before 1.652 for Perl allow a heap out-of-bounds write via an unvalidated numeric placeholder that sets the binder counter in preparse","descriptions":[{"lang":"en","value":"DBI versions before 1.652 for Perl allow a heap out-of-bounds write via an unvalidated numeric placeholder that sets the binder counter in preparse.\n\npreparse reserves seven output bytes per input byte, the width of the longest ':p99999' expansion. The ':N' branch parses the number with `atoi(src)` and assigns it to the binder counter with no range check, so a statement containing ':2147483648' leaves the counter negative (-2147483648 with glibc, where atoi wraps). Each following '?' then expands through `sprintf(start, \":p%d\", idx++)` to ':p-2147483648', 14 bytes with the terminating NUL where the buffer budgets 7. The placeholder limit added in 1.650 tests the counter against 99,999, which a negative counter passes.\n\nAny caller that preparses an untrusted statement into ':pN' style placeholders gets a heap out-of-bounds write that grows with the number of '?' marks following the poisoned placeholder. The '?' and '%s' return styles compare the parsed number against the expected sequence and error out, and are unaffected."}],"affected":[{"packageName":"DBI","packageURL":"pkg:cpan/DBI","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.652","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","modules":["DBI"],"programFiles":["DBI.xs"],"programRoutines":[{"name":"preparse"}],"repo":"https://github.com/perl5-dbi/dbi"}],"references":[{"url":"https://github.com/perl5-dbi/dbi/security/advisories/GHSA-623j-hfpc-mrc4","tags":["vendor-advisory"]},{"url":"https://github.com/perl5-dbi/dbi/commit/29b72ae7d2a8114a734a55840bf1c45b89207809.patch","tags":["patch"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-14739","tags":["related"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-10879","tags":["related"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1284","description":"CWE-1284 Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CPANSec","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateUpdated":"2026-08-15T12:09:22.962Z"},"credits":[{"lang":"en","type":"finder","value":"Harsh Raj Singhania"}],"solutions":[{"lang":"en","value":"Upgrade to DBI 1.652 or later."}],"source":{"discovery":"UNKNOWN"},"workarounds":[{"lang":"en","value":"For deployments that cannot be upgraded, limit SQL statements to 99,999 placeholders."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.1,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-17T20:29:15.870047Z","id":"CVE-2026-73194","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-17T20:29:56.764Z"}}]}}}