Vulnerability-Lookup

CVE-2026-13051 (GCVE-0-2026-13051)

Vulnerability from cvelistv5 – Published: 2026-08-13 16:28 – Updated: 2026-08-14 17:47

Title

Summary

Form::Processor::Field::HtmlArea versions from 0.06 through 1.162360 for Perl allow attacker selected method dispatch and resource exhaustion via an HTML::Tidy diagnostic that validate passes to add_error as a Locale::Maketext template. validate runs HTML::Tidy over the submitted markup and passes each resulting message to add_error as its first argument, which add_error hands to the language handle as the Locale::Maketext message key. The default handle's lexicon sets `_AUTO`, so a message that is not a lexicon entry is compiled as a bracket notation template instead of being looked up. Tidy diagnostics quote the offending attribute name or value, so a bracket group in the submitted markup reaches the template position, where the first token of the group names a method called on the language handle and the remaining tokens are its arguments. A group such as `[0]` makes the compile croak, and neither the field nor the handle catches it, so the exception leaves validate. `[sprintf,%2000000000d,7]` reaches CORE::sprintf with an attacker chosen field width. One submission of crafted markup to an HtmlArea field throws an unhandled exception out of form validation or allocates an arbitrary amount of memory, and an application whose language handle subclass defines side effecting public methods makes those callable with attacker chosen arguments. The other field types pass fixed templates with the submitted value in an argument slot, where it stays inert, and are unaffected.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 17:46 UTC

CWE

CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
CWE-470 - Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Assigner

CPANSec

References

4 references

URL	Tags
https://security.metacpan.org/patches/F/Form-Proc…	patch
https://metacpan.org/release/HANK/Form-Processor-…
https://metacpan.org/release/HANK/Form-Processor-…
https://www.cve.org/CVERecord?id=CVE-2012-6329	related

Impacted products

1 product

Vendor	Product	Version
		Affected: 0.06 , ≤ 1.162360 (custom)

Show details on NVD website

JSON

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              "attackComplexity": "LOW",
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                    "Exploitation": "none"
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          "defaultStatus": "unaffected",
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          "url": "https://www.cve.org/CVERecord?id=CVE-2012-6329"
        }
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      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Form::Processor::Field::HtmlArea versions from 0.06 through 1.162360 for Perl allow attacker selected method dispatch and resource exhaustion via an HTML::Tidy diagnostic that validate passes to add_error as a Locale::Maketext template",
      "workarounds": [
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    "state": "PUBLISHED"
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    "epss": {
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      "date": "2026-08-15",
      "epss": "0.00451",
      "percentile": "0.3743"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-13051\",\"sourceIdentifier\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"published\":\"2026-08-13T17:17:19.513\",\"lastModified\":\"2026-08-14T18:17:22.160\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Form::Processor::Field::HtmlArea versions from 0.06 through 1.162360 for Perl allow attacker selected method dispatch and resource exhaustion via an HTML::Tidy diagnostic that validate passes to add_error as a Locale::Maketext template.\\n\\nvalidate runs HTML::Tidy over the submitted markup and passes each resulting message to add_error as its first argument, which add_error hands to the language handle as the Locale::Maketext message key. The default handle\u0027s lexicon sets `_AUTO`, so a message that is not a lexicon entry is compiled as a bracket notation template instead of being looked up. Tidy diagnostics quote the offending attribute name or value, so a bracket group in the submitted markup reaches the template position, where the first token of the group names a method called on the language handle and the remaining tokens are its arguments. A group such as `[0]` makes the compile croak, and neither the field nor the handle catches it, so the exception leaves validate. `[sprintf,%2000000000d,7]` reaches CORE::sprintf with an attacker chosen field width.\\n\\nOne submission of crafted markup to an HtmlArea field throws an unhandled exception out of form validation or allocates an arbitrary amount of memory, and an application whose language handle subclass defines side effecting public methods makes those callable with attacker chosen arguments. The other field types pass fixed templates with the submitted value in an argument slot, where it stays inert, and are unaffected.\"}],\"affected\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"affectedData\":[{\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://cpan.org/modules\",\"packageName\":\"Form-Processor\",\"modules\":[\"Form::Processor::Field::HtmlArea\"],\"programFiles\":[\"lib/Form/Processor/Field/HtmlArea.pm\",\"lib/Form/Processor/Field.pm\",\"lib/Form/Processor/I18N/en_us.pm\"],\"programRoutines\":[{\"name\":\"Form::Processor::Field::HtmlArea::validate\"},{\"name\":\"Form::Processor::Field::add_error\"}],\"packageURL\":\"pkg:cpan/Form-Processor\",\"versions\":[{\"version\":\"0.06\",\"lessThanOrEqual\":\"1.162360\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N\",\"baseScore\":9.1,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":5.2}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-08-14T17:46:53.839329Z\",\"id\":\"CVE-2026-13051\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-470\"},{\"lang\":\"en\",\"value\":\"CWE-1336\"}]}],\"references\":[{\"url\":\"https://metacpan.org/release/HANK/Form-Processor-1.162360/source/lib/Form/Processor/Field.pm#L163\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://metacpan.org/release/HANK/Form-Processor-1.162360/source/lib/Form/Processor/Field/HtmlArea.pm#L28-31\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://security.metacpan.org/patches/F/Form-Processor/1.162360/CVE-2026-13051-r1.patch\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"},{\"url\":\"https://www.cve.org/CVERecord?id=CVE-2012-6329\",\"source\":\"9b29abf9-4ab0-4765-b253-1875cd9b441e\"}]}}",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-13051",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-13051.json",
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    "vulnrichment": {
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}

GHSA-FHX5-GRQF-HX29

Vulnerability from github – Published: 2026-08-13 18:31 – Updated: 2026-08-14 18:31

Details

validate runs HTML::Tidy over the submitted markup and passes each resulting message to add_error as its first argument, which add_error hands to the language handle as the Locale::Maketext message key. The default handle's lexicon sets _AUTO, so a message that is not a lexicon entry is compiled as a bracket notation template instead of being looked up. Tidy diagnostics quote the offending attribute name or value, so a bracket group in the submitted markup reaches the template position, where the first token of the group names a method called on the language handle and the remaining tokens are its arguments. A group such as [0] makes the compile croak, and neither the field nor the handle catches it, so the exception leaves validate. [sprintf,%2000000000d,7] reaches CORE::sprintf with an attacker chosen field width.

One submission of crafted markup to an HtmlArea field throws an unhandled exception out of form validation or allocates an arbitrary amount of memory, and an application whose language handle subclass defines side effecting public methods makes those callable with attacker chosen arguments. The other field types pass fixed templates with the submitted value in an argument slot, where it stays inert, and are unaffected.

Severity

9.1 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-13051"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-470"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-13T17:17:19Z",
    "severity": "CRITICAL"
  },
  "details": "Form::Processor::Field::HtmlArea versions from 0.06 through 1.162360 for Perl allow attacker selected method dispatch and resource exhaustion via an HTML::Tidy diagnostic that validate passes to add_error as a Locale::Maketext template.\n\nvalidate runs HTML::Tidy over the submitted markup and passes each resulting message to add_error as its first argument, which add_error hands to the language handle as the Locale::Maketext message key. The default handle\u0027s lexicon sets `_AUTO`, so a message that is not a lexicon entry is compiled as a bracket notation template instead of being looked up. Tidy diagnostics quote the offending attribute name or value, so a bracket group in the submitted markup reaches the template position, where the first token of the group names a method called on the language handle and the remaining tokens are its arguments. A group such as `[0]` makes the compile croak, and neither the field nor the handle catches it, so the exception leaves validate. `[sprintf,%2000000000d,7]` reaches CORE::sprintf with an attacker chosen field width.\n\nOne submission of crafted markup to an HtmlArea field throws an unhandled exception out of form validation or allocates an arbitrary amount of memory, and an application whose language handle subclass defines side effecting public methods makes those callable with attacker chosen arguments. The other field types pass fixed templates with the submitted value in an argument slot, where it stays inert, and are unaffected.",
  "id": "GHSA-fhx5-grqf-hx29",
  "modified": "2026-08-14T18:31:29Z",
  "published": "2026-08-13T18:31:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13051"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/HANK/Form-Processor-1.162360/source/lib/Form/Processor/Field.pm#L163"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/release/HANK/Form-Processor-1.162360/source/lib/Form/Processor/Field/HtmlArea.pm#L28-31"
    },
    {
      "type": "WEB",
      "url": "https://security.metacpan.org/patches/F/Form-Processor/1.162360/CVE-2026-13051-r1.patch"
    },
    {
      "type": "WEB",
      "url": "https://www.cve.org/CVERecord?id=CVE-2012-6329"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-13051 (GCVE-0-2026-13051)

GHSA-FHX5-GRQF-HX29

Tags

Sightings

Nomenclature