High
jawn — security advisory
Jawn is an open source JSON parser. Extenders of the `org.typelevel.jawn.SimpleFacade` and `org.typelevel.jawn.MutableFacade` who don't override `objectContext()` are vulnerable to a hash collision attack which may result in a denial of service. Most applications do not implement these traits directly, but inherit from a library. `jawn-parser-1.3.1` fixes this issue and users are advised to upgrade. For users unable to upgrade override `objectContext()` to use a collision-safe collection.
- Products
- jawn
- Affected versions
- 0.11.1+really0.6.0-1, 0.11.1+really0.6.0-1build1
- Fixed versions
- Not specified
- CVEs
- CVE-2022-21653
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:39 UTC · Revision 1
Source evidence
Jawn is an open source JSON parser. Extenders of the `org.typelevel.jawn.SimpleFacade` and `org.typelevel.jawn.MutableFacade` who don't override `objectContext()` are vulnerable to a hash collision attack which may result in a denial of service. Most applications do not implement these traits directly, but inherit from a library. `jawn-parser-1.3.1` fixes this issue and users are advised to upgrade. For users unable to upgrade override `objectContext()` to use a collision-safe collection.
osv:UBUNTU-CVE-2022-21653
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
jawn
Fixed versions: Not specified
Complete source record
{
"id": "a4a05ab61817d64728832a3cbafe34035ad6e6ee8745e00b210d3e83da279314",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2022-21653",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2022-21653",
"summary": "Jawn is an open source JSON parser. Extenders of the `org.typelevel.jawn.SimpleFacade` and `org.typelevel.jawn.MutableFacade` who don't override `objectContext()` are vulnerable to a hash collision attack which may result in a denial of service. Most applications do not implement these traits directly, but inherit from a library. `jawn-parser-1.3.1` fixes this issue and users are advised to upgrade. For users unable to upgrade override `objectContext()` to use a collision-safe collection.",
"evidence": "osv:UBUNTU-CVE-2022-21653",
"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"
}
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{
"name": {
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{
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"affected_versions": [
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"evidence": "/affected/4/versions"
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{
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"affected_versions": [
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"evidence": "/affected/5/versions"
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{
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"evidence": "/affected/5/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2022-21653",
"aliases": [
"UBUNTU-CVE-2022-21653"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"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"
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],
"package": {
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"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/2022/UBUNTU-CVE-2022-21653.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libjawn-java",
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},
{
"ranges": [
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],
"package": {
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"purl": "pkg:deb/ubuntu/jawn?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
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"database_specific": {
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},
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"database_specific": {
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"package": {
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"ecosystem": "Ubuntu:25.10"
},
"versions": [
"0.11.1+really0.6.0-1"
],
"database_specific": {
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"ecosystem": "Ubuntu:26.10"
},
"versions": [
"0.11.1+really0.6.0-1build1"
],
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"package": {
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"0.11.1+really0.6.0-1",
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"database_specific": {
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"ecosystem_specific": {
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{
"binary_name": "libjawn-java",
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}
],
"modified": "2026-10-17T12:55:56.862668777Z",
"provider": "osv",
"upstream": [
"CVE-2022-21653"
],
"references": [
"https://ubuntu.com/security/CVE-2022-21653",
"https://github.com/typelevel/jawn/pull/390",
"https://github.com/typelevel/jawn/security/advisories/GHSA-vc89-hccf-rq55",
"https://www.cve.org/CVERecord?id=CVE-2022-21653"
]
},
"related_cves": [
{
"value": "CVE-2022-21653",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 354347,
"published_at": "2022-01-05T21:15:00+00:00"
}