CVE-2026-47770

Full vulnerability record from the local CVENow database.

Description

jq is a command-line JSON processor. Prior to 1.8.2, comparing two sufficiently deeply nested arrays with the == operator exhausts the C stack on jq's ordinary command-line surface, resulting in denial of service via stack exhaustion (uncontrolled recursion). The crash occurs in jq's recursive structural comparison code, with the recursion repeating through jvp_array_equal() and jv_equal() in src/jv.c when comparing deeply nested arrays; a nearby sort comparator path through jv_cmp() in src/jv_aux.c overflows the stack at a larger nesting depth from the same missing recursion guard. Anyone running jq comparisons on attacker-controlled deeply nested JSON values, or embedding jq in a context where untrusted data can reach the == comparison path, is affected. This vulnerability is fixed in 1.8.2.

Severity

MEDIUM

CVSS score

6.8 (v4.0)

Vulnerability status

Analyzed

Source identifier

[email protected]

Published

2026-06-25 18:16:38.080000

Last modified

2026-10-25 22:10:00.150000

View original CVE JSON

{
  "id": "CVE-2026-47770",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-25T18:16:38.080",
  "lastModified": "2026-10-25T22:10:00.150",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "jq is a command-line JSON processor. Prior to 1.8.2, comparing two sufficiently deeply nested arrays with the == operator exhausts the C stack on jq's ordinary command-line surface, resulting in denial of service via stack exhaustion (uncontrolled recursion). The crash occurs in jq's recursive structural comparison code, with the recursion repeating through jvp_array_equal() and jv_equal() in src/jv.c when comparing deeply nested arrays; a nearby sort comparator path through jv_cmp() in src/jv_aux.c overflows the stack at a larger nesting depth from  the same missing recursion guard. Anyone running jq comparisons on attacker-controlled deeply nested JSON values, or embedding jq in a context  where untrusted data can reach the == comparison path, is affected. This vulnerability is fixed in 1.8.2."
    },
    {
      "lang": "es",
      "value": "jq es un procesador JSON de línea de comandos. Antes de la versión 1.8.2, comparar dos arrays anidados con suficiente profundidad con el operador == agota la pila C en la superficie de línea de comandos ordinaria de jq, resultando en denegación de servicio a través del agotamiento de la pila (recursión incontrolada). El fallo ocurre en el código de comparación estructural recursiva de jq, con la recursión repitiéndose a través de jvp_array_equal() y jv_equal() en src/jv.c al comparar arrays profundamente anidados; una ruta de comparador de ordenación cercana a través de jv_cmp() en src/jv_aux.c desborda la pila a una profundidad de anidamiento mayor por la misma guardia de recursión faltante. Cualquiera que ejecute comparaciones de jq en valores JSON profundamente anidados controlados por el atacante, o que incruste jq en un contexto donde datos no confiables puedan alcanzar la ruta de comparación ==, se ve afectado. Esta vulnerabilidad está corregida en la versión 1.8.2."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "jqlang",
          "product": "jq",
          "versions": [
            {
              "version": "< 1.8.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
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          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
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          "userInteraction": "PASSIVE",
          "vulnConfidentialityImpact": "NONE",
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          "subConfidentialityImpact": "NONE",
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          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
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          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
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    ],
    "cvssMetricV31": [
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        "source": "[email protected]",
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        "cvssData": {
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          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
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          "availabilityImpact": "HIGH"
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    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-26T17:50:44.688232Z",
          "id": "CVE-2026-47770",
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            {
              "exploitation": "none"
            },
            {
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          "role": "CISA Coordinator",
          "version": "2.0.3"
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  "weaknesses": [
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      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
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  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
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  "references": [
    {
      "url": "https://github.com/jqlang/jq/security/advisories/GHSA-3pgx-frr7-3jxp",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ]
    }
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}