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CVE-2026-2858

Estado: AnalizadaBaja (1.9)—

A vulnerability was identified in wren-lang wren up to 0.4.0. This affects the function peekChar of the file src/vm/wren_compiler.c of the component Source File Parser. Such manipulation leads to out-of-bounds read. The attack needs to be performed locally. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Wren — Wren

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-2858",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-2858",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
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              "automatable": "no"
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          "version": "2.0.3",
          "timestamp": "2026-02-24T14:50:12.709474Z"
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    "cvssMetricV31": [
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        "cvssData": {
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          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
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          "Automatable": "NOT_DEFINED",
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          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "PROOF_OF_CONCEPT",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
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          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "affected": [
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      "affectedData": [
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          "modules": [
            "Source File Parser"
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              "version": "0.2"
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              "version": "0.3"
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        "Product"
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      "source": "cna@vuldb.com"
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      "tags": [
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      "tags": [
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    },
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      "url": "https://vuldb.com/?ctiid.347097",
      "tags": [
        "Permissions Required",
        "VDB Entry"
      ],
      "source": "cna@vuldb.com"
    },
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      "url": "https://vuldb.com/?id.347097",
      "tags": [
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        "VDB Entry"
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      "source": "cna@vuldb.com"
    },
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      "tags": [
        "Third Party Advisory",
        "VDB Entry"
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      "source": "cna@vuldb.com"
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "type": "Secondary",
      "source": "cna@vuldb.com",
      "description": [
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          "lang": "en",
          "value": "CWE-119"
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      "description": [
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          "lang": "en",
          "value": "CWE-125"
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      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was identified in wren-lang wren up to 0.4.0. This affects the function peekChar of the file src/vm/wren_compiler.c of the component Source File Parser. Such manipulation leads to out-of-bounds read. The attack needs to be performed locally. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad fue identificada en wren-lang wren hasta 0.4.0. Esto afecta a la función peekChar del archivo src/vm/wren_compiler.c del componente Source File Parser. Dicha manipulación conduce a una lectura fuera de límites. El ataque necesita ser realizado localmente. El exploit está disponible públicamente y podría ser utilizado. El proyecto fue informado del problema tempranamente a través de un informe de incidencia pero aún no ha respondido."
    }
  ],
  "lastModified": "2026-06-17T10:31:53.943",
  "configurations": [
    {
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        {
          "negate": false,
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              "versionEndIncluding": "0.4.0"
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  "sourceIdentifier": "cna@vuldb.com"
}