{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-19873","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","state":"PUBLISHED","assignerShortName":"CPANSec","dateReserved":"2026-08-14T12:57:36.382Z","datePublished":"2026-08-31T10:07:32.134Z","dateUpdated":"2026-09-01T08:10:22.796Z"},"containers":{"cna":{"affected":[{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","modules":["HTML::FormFu"],"packageName":"HTML-FormFu","packageURL":"pkg:cpan/HTML-FormFu","programFiles":["lib/HTML/FormFu/Element/Repeatable.pm","lib/HTML/FormFu/Constraint.pm"],"programRoutines":[{"name":"HTML::FormFu::Element::Repeatable::process"},{"name":"HTML::FormFu::Element::Repeatable::repeat"},{"name":"HTML::FormFu::Constraint::_find_field_value"}],"repo":"https://github.com/FormFu/HTML-FormFu","versions":[{"lessThanOrEqual":"2.08","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"HTML::FormFu versions through 2.08 for Perl allow resource exhaustion via an unbounded repeat count from the query string in Repeatable elements.\n\nWhen a Repeatable element has counter_name set, its process method reads the repeat count from the named query string parameter, checks only that it is a positive integer, and passes it to repeat, which deep-clones the element's child subtree once per iteration. Nothing caps the value, and no attribute lets an application impose a limit.\n\nThe count is read on every request, before the form decides whether it was submitted, so a plain GET reaches the clone loop with no credentials, no session and no request body. Nesting multiplies: a Repeatable inside a Repeatable takes a counter at each level, so an outer and an inner value of 100 build 10,000 clones.\n\nOnce the form is submitted, each cloned field's constraints scan the whole element tree in _find_field_value, so cost grows faster than linearly with the count. A single request exhausts memory and CPU.\n\nThe latest release on CPAN is 2.07, from 2018. Version 2.08 exists only in the git repository."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1284","description":"CWE-1284 Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-770","description":"CWE-770 Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","shortName":"CPANSec","dateUpdated":"2026-08-31T10:07:32.134Z"},"references":[{"tags":["issue-tracking"],"url":"https://github.com/FormFu/HTML-FormFu/issues/71"},{"tags":["patch"],"url":"https://security.metacpan.org/patches/H/HTML-FormFu/2.08/CVE-2026-19873-r1.patch"}],"solutions":[{"lang":"en","value":"Apply the patch. There is no fixed release."}],"source":{"discovery":"UNKNOWN"},"title":"HTML::FormFu versions through 2.08 for Perl allow resource exhaustion via an unbounded repeat count from the query string in Repeatable elements","workarounds":[{"lang":"en","value":"For deployments that cannot apply the patch, reject or clamp the counter parameter before passing the query to process. Where the client-side repeat feature is not needed, unsetting counter_name stops the count being read from the query string."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/08/31/7"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/01/1"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-09-01T08:10:22.796Z"}},{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-31T17:56:55.337977Z","id":"CVE-2026-19873","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-31T17:57:13.999Z"}}]}}