Vulnerability-Lookup

GHSA-VGHF-HV5Q-VC2G

Vulnerability from github – Published: 2025-11-27 06:31 – Updated: 2026-01-31 03:33

Summary

Validator is Vulnerable to Incomplete Filtering of One or More Instances of Special Elements

Details

Versions of the package validator before 13.15.22 are vulnerable to Incomplete Filtering of One or More Instances of Special Elements in the isLength() function that does not take into account Unicode variation selectors (\uFE0F, \uFE0E) appearing in a sequence which lead to improper string length calculation. This can lead to an application using isLength for input validation accepting strings significantly longer than intended, resulting in issues like data truncation in databases, buffer overflows in other system components, or denial-of-service.

Severity

7.5 (High)


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

7.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "validator"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "13.15.22"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-12758"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-172",
      "CWE-792"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-02T16:51:42Z",
    "nvd_published_at": "2025-11-27T05:16:12Z",
    "severity": "HIGH"
  },
  "details": "Versions of the package validator before 13.15.22 are vulnerable to Incomplete Filtering of One or More Instances of Special Elements in the isLength() function that does not take into account Unicode variation selectors (\\uFE0F, \\uFE0E) appearing in a sequence which lead to improper string length calculation. This can lead to an application using isLength for input validation accepting strings significantly longer than intended, resulting in issues like data truncation in databases, buffer overflows in other system components, or denial-of-service.",
  "id": "GHSA-vghf-hv5q-vc2g",
  "modified": "2026-01-31T03:33:13Z",
  "published": "2025-11-27T06:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-12758"
    },
    {
      "type": "WEB",
      "url": "https://github.com/validatorjs/validator.js/pull/2616"
    },
    {
      "type": "WEB",
      "url": "https://github.com/validatorjs/validator.js/commit/d457ecaf55b0f3d8bd379d82757425d0d13dd382"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/koral--/ad31208b25b9e3d1e2e35f1d4d72572e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/validatorjs/validator.js"
    },
    {
      "type": "WEB",
      "url": "https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-13653476"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/fulldisclosure/2026/Jan/27"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Validator is Vulnerable to Incomplete Filtering of One or More Instances of Special Elements"
}

CVE-2025-12758 (GCVE-0-2025-12758)

Vulnerability from cvelistv5 – Published: 2025-11-27 05:00 – Updated: 2026-08-08 15:25

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-03 16:27 UTC

CWE

CWE-792 - Incomplete Filtering of One or More Instances of Special Elements
CWE-172 - Encoding Error

Assigner

snyk mitre root

References

5 references

URL	Tags
https://security.snyk.io/vuln/SNYK-JS-VALIDATOR-1…
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJAR…
https://gist.github.com/koral--/ad31208b25b9e3d1e…
https://github.com/validatorjs/validator.js/pull/2616
http://seclists.org/fulldisclosure/2026/Jan/27

Impacted products

2 products

Vendor	Product	Version
n/a	validator	Affected: 0 , < 13.15.22 (semver)
n/a	org.webjars.npm:validator	Affected: 0 , < 13.15.22 (semver)

Credits

Karol Wrótniak

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-12758",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-03T16:27:54.528645Z",
                "version": "2.0.3"
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        "problemTypes": [
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            "descriptions": [
              {
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                "description": "CWE-172 Encoding Error",
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        "references": [
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        "references": [
          {
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          }
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      }
    ],
    "cna": {
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          "vendor": "n/a",
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      "credits": [
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        }
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        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "attackComplexity": "LOW",
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            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "exploitCodeMaturity": "PROOF_OF_CONCEPT",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
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            "userInteraction": "NONE",
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            "baseSeverity": "HIGH",
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            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P",
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      "providerMetadata": {
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}

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.