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UBUNTU-CVE-2026-59990 (CVE-2026-59990)

Vulnerability from osv_ubuntu – Published: 2026-09-24 00:00 – Updated: 2026-09-24 00:00 – Source website

Details

Jawn is an open source JSON parser. Prior to 1.7.0, Jawn parse methods accept arbitrarily deep JSON array and object nesting without a depth limit, allowing a remote attacker who can submit untrusted JSON to grow parser contexts until the JVM heap is exhausted. The resulting java.lang.OutOfMemoryError is a fatal Scala error that is not ordinarily handled by scala.util.Try or cats.effect.IO, causing denial of service. This issue is fixed in version 1.7.0.

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-59990	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-59990	REPORT
	https://github.com/typelevel/jawn/commit/191cb3a4…	REPORT
	https://github.com/typelevel/jawn/commit/62196666…	REPORT
	https://github.com/typelevel/jawn/commit/93ac93e9…	REPORT
	https://github.com/typelevel/jawn/commit/f6ace7e0…	REPORT
	https://github.com/typelevel/jawn/releases/tag/v1.7.0	REPORT
	https://github.com/typelevel/jawn/security/adviso…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjawn-java",
            "binary_version": "0.11.1+really0.6.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "jawn",
        "purl": "pkg:deb/ubuntu/jawn@0.11.1+really0.6.0-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.11.1+really0.6.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjawn-java",
            "binary_version": "0.11.1+really0.6.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "jawn",
        "purl": "pkg:deb/ubuntu/jawn@0.11.1+really0.6.0-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.11.1+really0.6.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjawn-java",
            "binary_version": "0.11.1+really0.6.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "jawn",
        "purl": "pkg:deb/ubuntu/jawn@0.11.1+really0.6.0-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.11.1+really0.6.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libjawn-java",
            "binary_version": "0.11.1+really0.6.0-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "jawn",
        "purl": "pkg:deb/ubuntu/jawn@0.11.1+really0.6.0-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.11.1+really0.6.0-1",
        "0.11.1+really0.6.0-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "Jawn is an open source JSON parser. Prior to 1.7.0, Jawn parse methods accept arbitrarily deep JSON array and object nesting without a depth limit, allowing a remote attacker who can submit untrusted JSON to grow parser contexts until the JVM heap is exhausted. The resulting java.lang.OutOfMemoryError is a fatal Scala error that is not ordinarily handled by scala.util.Try or cats.effect.IO, causing denial of service. This issue is fixed in version 1.7.0.",
  "id": "UBUNTU-CVE-2026-59990",
  "modified": "2026-09-24T00:00:00Z",
  "published": "2026-09-24T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-59990"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-59990"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a04"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/typelevel/jawn/commit/6219666641f9408498f85868f835e17bd8a72fed"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/typelevel/jawn/commit/93ac93e9c992c11b4c03d5455d8551f9fb24da1b"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/typelevel/jawn/commit/f6ace7e0db715de1a8c4618bed9378333a5c2214"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/typelevel/jawn/releases/tag/v1.7.0"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/typelevel/jawn/security/advisories/GHSA-cc4v-rvgp-2pf3"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-59990"
  ]
}

CVE-2026-59990 (GCVE-0-2026-59990)

Vulnerability from cvelistv5 – Published: 2026-09-23 18:41 – Updated: 2026-09-23 19:27

Title

Jawn: Uncontrolled nesting depth in JSON parser

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-23 19:27 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/typelevel/jawn/security/adviso…	x_refsource_CONFIRM
https://github.com/typelevel/jawn/commit/191cb3a4…	x_refsource_MISC
https://github.com/typelevel/jawn/commit/62196666…	x_refsource_MISC
https://github.com/typelevel/jawn/commit/93ac93e9…	x_refsource_MISC
https://github.com/typelevel/jawn/commit/f6ace7e0…	x_refsource_MISC
https://github.com/typelevel/jawn/releases/tag/v1.7.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
typelevel	jawn	Affected: < 1.7.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-59990",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-23T19:27:50.740766Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-23T19:27:58.498Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "jawn",
          "vendor": "typelevel",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.7.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Jawn is an open source JSON parser. Prior to 1.7.0, Jawn parse methods accept arbitrarily deep JSON array and object nesting without a depth limit, allowing a remote attacker who can submit untrusted JSON to grow parser contexts until the JVM heap is exhausted. The resulting java.lang.OutOfMemoryError is a fatal Scala error that is not ordinarily handled by scala.util.Try or cats.effect.IO, causing denial of service. This issue is fixed in version 1.7.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
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          "url": "https://github.com/typelevel/jawn/security/advisories/GHSA-cc4v-rvgp-2pf3"
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          "name": "https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a04",
          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a04"
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          ],
          "url": "https://github.com/typelevel/jawn/commit/93ac93e9c992c11b4c03d5455d8551f9fb24da1b"
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        },
        {
          "name": "https://github.com/typelevel/jawn/releases/tag/v1.7.0",
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        "advisory": "GHSA-cc4v-rvgp-2pf3",
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      "title": "Jawn: Uncontrolled nesting depth in JSON parser"
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    "dateReserved": "2026-07-07T19:41:00.005Z",
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    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

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.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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UBUNTU-CVE-2026-59990 (CVE-2026-59990)

CVE-2026-59990 (GCVE-0-2026-59990)

Tags

Sightings

Nomenclature

Related by attack behaviour