High
jawn — security advisory
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.
- Products
- jawn
- Affected versions
- 0.11.1+really0.6.0-1, 0.11.1+really0.6.0-1build1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-59990
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:44 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-59990
jawn
Fixed versions: Not specified
jawn
Fixed versions: Not specified
jawn
Fixed versions: Not specified
jawn
Fixed versions: Not specified
jawn
Fixed versions: Not specified
Complete source record
{
"id": "538747d875fa6542b9d423316aa0823207abfc205a263038cc5013f6d534379f",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-59990",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-59990",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-59990",
"products": [
{
"name": {
"value": "jawn",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.11.1+really0.6.0-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "jawn",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.11.1+really0.6.0-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "jawn",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.11.1+really0.6.0-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/3/versions"
}
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},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.11.1+really0.6.0-1",
"evidence": "/affected/4/versions"
},
{
"value": "0.11.1+really0.6.0-1build1",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-59990",
"aliases": [
"UBUNTU-CVE-2026-59990"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jawn",
"purl": "pkg:deb/ubuntu/jawn?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"0.11.1+really0.6.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59990.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libjawn-java",
"binary_version": "0.11.1+really0.6.0-1"
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]
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},
{
"ranges": [
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],
"package": {
"name": "jawn",
"purl": "pkg:deb/ubuntu/jawn?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"0.11.1+really0.6.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59990.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libjawn-java",
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}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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],
"package": {
"name": "jawn",
"purl": "pkg:deb/ubuntu/jawn?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"0.11.1+really0.6.0-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59990.json"
},
"ecosystem_specific": {
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{
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"package": {
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"purl": "pkg:deb/ubuntu/jawn?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"0.11.1+really0.6.0-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59990.json"
},
"ecosystem_specific": {
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}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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],
"package": {
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"purl": "pkg:deb/ubuntu/jawn?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"0.11.1+really0.6.0-1",
"0.11.1+really0.6.0-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59990.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libjawn-java",
"binary_version": "0.11.1+really0.6.0-1build1"
}
]
}
}
],
"modified": "2026-10-17T12:56:00.888821127Z",
"provider": "osv",
"upstream": [
"CVE-2026-59990"
],
"references": [
"https://ubuntu.com/security/CVE-2026-59990",
"https://www.cve.org/CVERecord?id=CVE-2026-59990",
"https://github.com/typelevel/jawn/commit/191cb3a44e77f1afab439ee636bf66bdf3c54a04",
"https://github.com/typelevel/jawn/commit/6219666641f9408498f85868f835e17bd8a72fed",
"https://github.com/typelevel/jawn/commit/93ac93e9c992c11b4c03d5455d8551f9fb24da1b",
"https://github.com/typelevel/jawn/commit/f6ace7e0db715de1a8c4618bed9378333a5c2214",
"https://github.com/typelevel/jawn/releases/tag/v1.7.0",
"https://github.com/typelevel/jawn/security/advisories/GHSA-cc4v-rvgp-2pf3"
]
},
"related_cves": [
{
"value": "CVE-2026-59990",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354563,
"published_at": "2026-09-23T19:17:00+00:00"
}