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CVE-2026-33487

Estado: ModificadaAlta (7.5)—

goxmlsig provides XML Digital Signatures implemented in Go. Prior to version 1.6.0, the `validateSignature` function in `validate.go` goes through the references in the `SignedInfo` block to find one that matches the signed element's ID. In Go versions before 1.22, or when `go.mod` uses an older version, there is a loop variable capture issue. The code takes the address of the loop variable `_ref` instead of its value. As a result, if more than one reference matches the ID or if the loop logic is incorrect, the `ref` pointer will always end up pointing to the last element in the `SignedInfo.References` slice after the loop. goxmlsig version 1.6.0 contains a patch.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad en validación de firmas XML en biblioteca remota (AV:N, PR:N, UI:N). Permite falsificación de firmas digitales explotando captura incorrecta de variable en loop.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkFilter Network TrafficApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Goxmldsig Project — Goxmldsig

CWE

Referencias

JSON original (NVD)

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  "published": "2026-03-26T18:16:30.070",
  "references": [
    {
      "url": "https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-479m-364c-43vc",
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        "Exploit",
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  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
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          "value": "CWE-347"
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    {
      "lang": "en",
      "value": "goxmlsig provides XML Digital Signatures implemented in Go. Prior to version 1.6.0, the `validateSignature` function in `validate.go` goes through the references in the `SignedInfo` block to find one that matches the signed element's ID. In Go versions before 1.22, or when `go.mod` uses an older version, there is a loop variable capture issue. The code takes the address of the loop variable `_ref` instead of its value. As a result, if more than one reference matches the ID or if the loop logic is incorrect, the `ref` pointer will always end up pointing to the last element in the `SignedInfo.References` slice after the loop. goxmlsig version 1.6.0 contains a patch."
    },
    {
      "lang": "es",
      "value": "goxmlsig proporciona Firmas Digitales XML implementadas en Go. Antes de la versión 1.6.0, la función 'validateSignature' en 'validate.go' recorre las referencias en el bloque 'SignedInfo' para encontrar una que coincida con el ID del elemento firmado. En versiones de Go anteriores a la 1.22, o cuando 'go.mod' utiliza una versión anterior, existe un problema de captura de variable de bucle. El código toma la dirección de la variable de bucle '_ref' en lugar de su valor. Como resultado, si más de una referencia coincide con el ID o si la lógica del bucle es incorrecta, el puntero 'ref' siempre terminará apuntando al último elemento en el slice 'SignedInfo.References' después del bucle. goxmlsig versión 1.6.0 contiene un parche."
    }
  ],
  "lastModified": "2026-09-09T13:19:24.923",
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    {
      "nodes": [
        {
          "negate": false,
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}