FKIE_CVE-2026-63762

Vulnerability from fkie_nvd - Published: 2026-07-20 12:19 - Updated: 2026-07-22 19:41
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
SurrealDB before v2.6.1 (and before v3.0.0-beta.3) contains a denial of service vulnerability in its embedded JavaScript scripting engine, which is enabled via the --allow-scripting capability (disabled by default). Any user able to execute arbitrary queries — including unauthenticated guests when --allow-guests is enabled — can use built-in string functions to construct a large string and pass it to the JavaScript runtime for compilation, triggering a null pointer dereference in the underlying QuickJS-NG engine. This causes the server process to terminate immediately without graceful shutdown, requiring a manual restart. The issue was fixed by updating the rquickjs dependency from v0.9.0 to v0.11.0.
References
disclosure@vulncheck.comhttps://github.com/surrealdb/surrealdb/security/advisories/GHSA-xx7m-69ff-9crpMitigation, Vendor Advisory
disclosure@vulncheck.comhttps://www.vulncheck.com/advisories/surrealdb-before-denial-of-service-via-scriptingThird Party Advisory
Impacted products
Vendor Product Version
surrealdb surrealdb *
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
surrealdb surrealdb 3.0.0
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:cargo/SurrealDB",
          "product": "surrealdb",
          "vendor": "surrealdb",
          "versions": [
            {
              "lessThan": "2.6.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "2.6.1",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:cargo/SurrealDB",
          "product": "surrealdb",
          "vendor": "surrealdb",
          "versions": [
            {
              "lessThan": "3.0.0-beta.3",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "3.0.0-beta.3",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "disclosure@vulncheck.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:surrealdb:surrealdb:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B66E7C8C-AD8B-4D26-A0A2-EFD889526306",
              "versionEndExcluding": "2.6.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:surrealdb:surrealdb:3.0.0:alpha1:*:*:*:*:*:*",
              "matchCriteriaId": "83C6C6C1-EEC9-439D-AC9D-C0693BFF5E1D",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "3860DB8A-97D5-424B-B1AE-81744820288C",
              "vulnerable": true
            },
            {
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              "vulnerable": true
            },
            {
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              "matchCriteriaId": "FE814CC4-38DB-4DB3-9A01-D4A0E04A1D5F",
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              "vulnerable": true
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              "matchCriteriaId": "021C19BF-6F23-44F9-B4EF-D666C7489A16",
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            },
            {
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              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:surrealdb:surrealdb:3.0.0:alpha6:*:*:*:*:*:*",
              "matchCriteriaId": "A589A4EF-EF41-4527-A3C8-68420E361F3D",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "1736B735-8761-4E2F-95D9-D9ACA4789676",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:surrealdb:surrealdb:3.0.0:alpha8:*:*:*:*:*:*",
              "matchCriteriaId": "871B8B8F-83B0-49A9-848B-D15D5D4B4B05",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:surrealdb:surrealdb:3.0.0:alpha9:*:*:*:*:*:*",
              "matchCriteriaId": "F07CDC5E-E692-4C56-95C1-140255860858",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:surrealdb:surrealdb:3.0.0:beta1:*:*:*:*:*:*",
              "matchCriteriaId": "DB76E7FF-77B1-43E1-A77B-49871C96D202",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "5D69592F-488E-4373-B03C-1D44B646AB2C",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "SurrealDB before v2.6.1 (and before v3.0.0-beta.3) contains a denial of service vulnerability in its embedded JavaScript scripting engine, which is enabled via the --allow-scripting capability (disabled by default). Any user able to execute arbitrary queries \u2014 including unauthenticated guests when --allow-guests is enabled \u2014 can use built-in string functions to construct a large string and pass it to the JavaScript runtime for compilation, triggering a null pointer dereference in the underlying QuickJS-NG engine. This causes the server process to terminate immediately without graceful shutdown, requiring a manual restart. The issue was fixed by updating the rquickjs dependency from v0.9.0 to v0.11.0."
    }
  ],
  "id": "CVE-2026-63762",
  "lastModified": "2026-07-22T19:41:01.317",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.0,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "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:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-63762",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-21T15:10:28.959578Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-20T12:19:46.477",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/surrealdb/surrealdb/security/advisories/GHSA-xx7m-69ff-9crp"
    },
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.vulncheck.com/advisories/surrealdb-before-denial-of-service-via-scripting"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.