libhtml-formhandler-perl — security advisory

{
  "id": "e6a9f46a29bb35932ce6241dad7837457bc6cd665cbb89e6e75d2ef8e3bdea40",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2022-4993",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2022-4993",
    "summary": "HTML::FormHandler versions before 0.410000 for Perl allow attacker selected method dispatch and resource exhaustion because _apply_actions and add_error use error message text built from request data as a Locale::Maketext bracket notation template. add_error hands its first argument to the language handle as the Locale::Maketext message key, and the default handle's lexicon sets `_AUTO`, so a string that is not a lexicon entry is compiled as a bracket notation template instead of being looked up. In a bracket group the first token names a method called on the language handle and the remaining tokens are its arguments. Three kinds of text the library did not author reach that position. _apply_actions installs a `$SIG{__WARN__}` handler that stores the warning text in `$error_message`, and a captured warning survives a successful action, so a field carrying a numeric transform turns `Argument \"[sprintf,%50000000d,0]\" isn't numeric` into the template; a warning quotes the submitted value verbatim, so the group is well formed and dispatches. `$error_message ||= $tobj->validate($new_value)` takes a type constraint's own failure message, which renders the rejected value through a partial dumper in bracket and comma form (Devel::PartialDump when Moose can load it, Type::Tiny's own dumper always), so a field with `apply => [ Str ]` given a parameter sent more than once, which arrives as an array, gets `Reference [\"a\",\"b\"] did not pass type constraint \"Str\"` as its template, from a re",
    "evidence": "osv:DEBIAN-CVE-2022-4993",
    "products": [
      {
        "name": {
          "value": "libhtml-formhandler-perl",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.40068-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.40068-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.410002-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "libhtml-formhandler-perl",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.40068-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "0.40068-3",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "0.410002-1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "libhtml-formhandler-perl",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.40068-3",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "0.40068-2",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "DEBIAN-CVE-2022-4993",
      "aliases": [
        "DEBIAN-CVE-2022-4993"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "libhtml-formhandler-perl",
            "purl": "pkg:deb/debian/libhtml-formhandler-perl?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "0.40068-2",
            "0.40068-3",
            "0.410002-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-4993.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "libhtml-formhandler-perl",
            "purl": "pkg:deb/debian/libhtml-formhandler-perl?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "0.40068-2",
            "0.40068-3",
            "0.410002-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-4993.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0.40068-3"
                }
              ]
            }
          ],
          "package": {
            "name": "libhtml-formhandler-perl",
            "purl": "pkg:deb/debian/libhtml-formhandler-perl?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "0.40068-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-4993.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-15T08:03:12.741552537Z",
      "provider": "osv",
      "upstream": [
        "CVE-2022-4993"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2022-4993"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2022-4993",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 325745,
  "published_at": "2026-08-13T17:17:17.78+00:00"
}