FKIE_CVE-2026-61814

Vulnerability from fkie_nvd - Published: 2026-09-23 19:17 - Updated: 2026-09-23 20:17
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Jawn is an open source JSON parser. Prior to 1.7.0, Jawn's AsyncParser can perform quadratic work when a single JSON token is delivered across many small chunks because each absorb call rescans the incomplete token from the start. A remote attacker who controls untrusted JSON input and its chunk sizes can exhaust CPU resources and cause denial of service in applications using AsyncParser. This issue is fixed in version 1.7.0.
References
security-advisories@github.comhttps://github.com/typelevel/jawn/commit/cddcd5e3387c356b05953f7b2af103d309687e4b
security-advisories@github.comhttps://github.com/typelevel/jawn/releases/tag/v1.7.0
security-advisories@github.comhttps://github.com/typelevel/jawn/security/advisories/GHSA-w4cm-gvhj-cgw6
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "jawn",
          "vendor": "typelevel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.7.0"
            }
          ]
        },
        {
          "product": "jawn-parser_2.12",
          "vendor": "org.typelevel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.7.0"
            }
          ]
        },
        {
          "product": "jawn-parser_2.13",
          "vendor": "org.typelevel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.7.0"
            }
          ]
        },
        {
          "product": "jawn-parser_3",
          "vendor": "org.typelevel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.7.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Jawn is an open source JSON parser. Prior to 1.7.0, Jawn\u0027s AsyncParser can perform quadratic work when a single JSON token is delivered across many small chunks because each absorb call rescans the incomplete token from the start. A remote attacker who controls untrusted JSON input and its chunk sizes can exhaust CPU resources and cause denial of service in applications using AsyncParser. This issue is fixed in version 1.7.0."
    }
  ],
  "id": "CVE-2026-61814",
  "lastModified": "2026-09-23T20:17:12.133",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-61814",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-23T19:25:56.569425Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-23T19:17:32.970",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/typelevel/jawn/commit/cddcd5e3387c356b05953f7b2af103d309687e4b"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/typelevel/jawn/releases/tag/v1.7.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/typelevel/jawn/security/advisories/GHSA-w4cm-gvhj-cgw6"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-407"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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