FKIE_CVE-2026-2656

Vulnerability from fkie_nvd - Published: 2026-02-18 15:18 - Updated: 2026-02-19 17:22
Severity ?
2.5 (Low) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Summary
A flaw has been found in ChaiScript up to 6.1.0. This affects the function chaiscript::Type_Info::bare_equal of the file include/chaiscript/dispatchkit/type_info.hpp. This manipulation causes use after free. The attack requires local access. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
References
cna@vuldb.comhttps://github.com/ChaiScript/ChaiScript/Product
cna@vuldb.comhttps://github.com/ChaiScript/ChaiScript/issues/636Exploit, Vendor Advisory, Issue Tracking
cna@vuldb.comhttps://github.com/ChaiScript/ChaiScript/issues/636#issue-3828333582Exploit, Vendor Advisory, Issue Tracking
cna@vuldb.comhttps://vuldb.com/?ctiid.346454Third Party Advisory, VDB Entry
cna@vuldb.comhttps://vuldb.com/?id.346454Third Party Advisory, VDB Entry
cna@vuldb.comhttps://vuldb.com/?submit.752790Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
chaiscript chaiscript *
To clipboard 

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      "nodes": [
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            {
              "criteria": "cpe:2.3:a:chaiscript:chaiscript:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7C9648DA-18A7-412B-AEE5-903C40744AD3",
              "versionEndIncluding": "6.1.0",
              "vulnerable": true
            }
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw has been found in ChaiScript up to 6.1.0. This affects the function chaiscript::Type_Info::bare_equal of the file include/chaiscript/dispatchkit/type_info.hpp. This manipulation causes use after free. The attack requires local access. The attack\u0027s complexity is rated as high. The exploitability is reported as difficult. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado una vulnerabilidad en ChaiScript hasta la versi\u00f3n 6.1.0. Esto afecta a la funci\u00f3n chaiscript::Type_Info::bare_equal del archivo include/chaiscript/dispatchkit/type_info.hpp. Esta manipulaci\u00f3n causa uso despu\u00e9s de liberar. El ataque requiere acceso local. La complejidad del ataque se califica como alta. La explotabilidad se informa como dif\u00edcil. El exploit ha sido publicado y puede ser utilizado. El proyecto fue informado del problema tempranamente a trav\u00e9s de un informe de incidencia, pero a\u00fan no ha respondido."
    }
  ],
  "id": "CVE-2026-2656",
  "lastModified": "2026-02-19T17:22:19.880",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "HIGH",
          "accessVector": "LOCAL",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 1.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:H/Au:S/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 1.5,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "LOW",
          "baseScore": 2.5,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 1.4,
        "source": "cna@vuldb.com",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.0,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-18T15:18:44.743",
  "references": [
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Product"
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      "url": "https://github.com/ChaiScript/ChaiScript/"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
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        "Vendor Advisory",
        "Issue Tracking"
      ],
      "url": "https://github.com/ChaiScript/ChaiScript/issues/636"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Exploit",
        "Vendor Advisory",
        "Issue Tracking"
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      "url": "https://github.com/ChaiScript/ChaiScript/issues/636#issue-3828333582"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
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      "url": "https://vuldb.com/?ctiid.346454"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
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      "url": "https://vuldb.com/?id.346454"
    },
    {
      "source": "cna@vuldb.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://vuldb.com/?submit.752790"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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