Medium
jq — security advisory
jq is a command-line JSON processor. In 1.8.1 and earlier, jv_contains recurses into nested arrays/objects with no depth limit. With a sufficiently nested input structure (built programmatically with reduce, since the JSON parser caps at depth 10000), the C stack is exhausted.
- Products
- jq
- Affected versions
- 1.2-8, 1.3-1, 1.3-1.1ubuntu1, 1.3-1.1ubuntu1.1, 1.3-1.1ubuntu1.1+esm3, 1.3-1.1ubuntu1.1+esm4, 1.4-2.1, 1.5+dfsg-1, 1.5+dfsg-1ubuntu0.1, 1.5+dfsg-1ubuntu0.1+esm2, 1.5+dfsg-1ubuntu0.1+esm3, 1.5+dfsg-1ubuntu0.1+esm4, 1.5+dfsg-2, 1.5+dfsg-2build1, 1.5+dfsg-2ubuntu0.1~esm1, 1.5+dfsg-2ubuntu0.1~esm2, 1.5+dfsg-2ubuntu0.1~esm3, 1.6-1, 1.6-1ubuntu0.20.04.1, 1.6-1ubuntu0.20.04.1+esm1, 1.6-1ubuntu0.20.04.1+esm2, 1.6-1ubuntu0.20.04.1+esm3, 1.6-2.1ubuntu2, 1.6-2.1ubuntu3, 1.6-2.1ubuntu3.1, 1.6-2.1ubuntu3.2, 1.6-3, 1.7-1, 1.7.1-2, 1.7.1-3, 1.7.1-3build1, 1.7.1-3ubuntu0.24.04.1, 1.7.1-3ubuntu0.24.04.2, 1.7.1-3ubuntu1, 1.7.1-6ubuntu1, 1.8.1-3ubuntu1, 1.8.1-3ubuntu1.1, 1.8.1-4ubuntu1, 1.8.1-4ubuntu2, 1.8.2-1ubuntu1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-40612
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:10 UTC · Revision 1
Source evidence
jq is a command-line JSON processor. In 1.8.1 and earlier, jv_contains recurses into nested arrays/objects with no depth limit. With a sufficiently nested input structure (built programmatically with reduce, since the JSON parser caps at depth 10000), the C stack is exhausted.
osv:UBUNTU-CVE-2026-40612
jq
Fixed versions: Not specified
jq
Fixed versions: Not specified
jq
Fixed versions: Not specified
jq
Fixed versions: Not specified
jq
Fixed versions: Not specified
jq
Fixed versions: Not specified
jq
Fixed versions: Not specified
jq
Fixed versions: Not specified
jq
Fixed versions: Not specified
Complete source record
{
"id": "f74cd5a5ef4cfd9df84a4e101cb87ceecfa726e9b5b56735917a394039378112",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-40612",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-40612",
"summary": "jq is a command-line JSON processor. In 1.8.1 and earlier, jv_contains recurses into nested arrays/objects with no depth limit. With a sufficiently nested input structure (built programmatically with reduce, since the JSON parser caps at depth 10000), the C stack is exhausted.",
"evidence": "osv:UBUNTU-CVE-2026-40612",
"products": [
{
"name": {
"value": "jq",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.2-8",
"evidence": "/affected/0/versions"
},
{
"value": "1.3-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3-1.1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3-1.1ubuntu1.1",
"evidence": "/affected/0/versions"
},
{
"value": "1.3-1.1ubuntu1.1+esm3",
"evidence": "/affected/0/versions"
},
{
"value": "1.3-1.1ubuntu1.1+esm4",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "jq",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.4-2.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.5+dfsg-1",
"evidence": "/affected/1/versions"
},
{
"value": "1.5+dfsg-1ubuntu0.1",
"evidence": "/affected/1/versions"
},
{
"value": "1.5+dfsg-1ubuntu0.1+esm2",
"evidence": "/affected/1/versions"
},
{
"value": "1.5+dfsg-1ubuntu0.1+esm3",
"evidence": "/affected/1/versions"
},
{
"value": "1.5+dfsg-1ubuntu0.1+esm4",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
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"evidence": "/affected/2/package/name"
},
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"affected_versions": [
{
"value": "1.5+dfsg-2",
"evidence": "/affected/2/versions"
},
{
"value": "1.5+dfsg-2ubuntu0.1~esm1",
"evidence": "/affected/2/versions"
},
{
"value": "1.5+dfsg-2ubuntu0.1~esm2",
"evidence": "/affected/2/versions"
},
{
"value": "1.5+dfsg-2ubuntu0.1~esm3",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "jq",
"evidence": "/affected/3/package/name"
},
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"affected_versions": [
{
"value": "1.5+dfsg-2build1",
"evidence": "/affected/3/versions"
},
{
"value": "1.6-1",
"evidence": "/affected/3/versions"
},
{
"value": "1.6-1ubuntu0.20.04.1",
"evidence": "/affected/3/versions"
},
{
"value": "1.6-1ubuntu0.20.04.1+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "1.6-1ubuntu0.20.04.1+esm2",
"evidence": "/affected/3/versions"
},
{
"value": "1.6-1ubuntu0.20.04.1+esm3",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "jq",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.6-2.1ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "1.6-2.1ubuntu3",
"evidence": "/affected/4/versions"
},
{
"value": "1.6-2.1ubuntu3.1",
"evidence": "/affected/4/versions"
},
{
"value": "1.6-2.1ubuntu3.2",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "jq",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.6-3",
"evidence": "/affected/5/versions"
},
{
"value": "1.7-1",
"evidence": "/affected/5/versions"
},
{
"value": "1.7.1-2",
"evidence": "/affected/5/versions"
},
{
"value": "1.7.1-3",
"evidence": "/affected/5/versions"
},
{
"value": "1.7.1-3build1",
"evidence": "/affected/5/versions"
},
{
"value": "1.7.1-3ubuntu0.24.04.1",
"evidence": "/affected/5/versions"
},
{
"value": "1.7.1-3ubuntu0.24.04.2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "jq",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.7.1-3ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "1.7.1-6ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "1.8.1-3ubuntu1",
"evidence": "/affected/6/versions"
},
{
"value": "1.8.1-3ubuntu1.1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "jq",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.8.1-4ubuntu1",
"evidence": "/affected/7/versions"
},
{
"value": "1.8.2-1ubuntu1",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "jq",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.8.1-3ubuntu1",
"evidence": "/affected/8/versions"
},
{
"value": "1.8.1-4ubuntu1",
"evidence": "/affected/8/versions"
},
{
"value": "1.8.1-4ubuntu2",
"evidence": "/affected/8/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-40612",
"aliases": [
"UBUNTU-CVE-2026-40612"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jq",
"purl": "pkg:deb/ubuntu/jq?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
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"1.3-1",
"1.3-1.1ubuntu1",
"1.3-1.1ubuntu1.1",
"1.3-1.1ubuntu1.1+esm3",
"1.3-1.1ubuntu1.1+esm4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40612.json"
},
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"binary_version": "1.3-1.1ubuntu1.1+esm4"
}
]
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"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.4-2.1",
"1.5+dfsg-1",
"1.5+dfsg-1ubuntu0.1",
"1.5+dfsg-1ubuntu0.1+esm2",
"1.5+dfsg-1ubuntu0.1+esm3",
"1.5+dfsg-1ubuntu0.1+esm4"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40612.json"
},
"ecosystem_specific": {
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{
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"package": {
"name": "jq",
"purl": "pkg:deb/ubuntu/jq?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.5+dfsg-2",
"1.5+dfsg-2ubuntu0.1~esm1",
"1.5+dfsg-2ubuntu0.1~esm2",
"1.5+dfsg-2ubuntu0.1~esm3"
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"1.6-1",
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"1.6-1ubuntu0.20.04.1+esm2",
"1.6-1ubuntu0.20.04.1+esm3"
],
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},
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"1.6-2.1ubuntu3",
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"1.6-2.1ubuntu3.2"
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},
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{
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"1.7.1-2",
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},
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{
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},
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},
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}
]
}
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{
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},
"versions": [
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"1.8.2-1ubuntu1"
],
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},
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{
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}
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}
},
{
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],
"package": {
"name": "jq",
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.8.1-3ubuntu1",
"1.8.1-4ubuntu1",
"1.8.1-4ubuntu2"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
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"binary_version": "1.8.1-4ubuntu2"
},
{
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}
]
}
}
],
"modified": "2026-10-17T12:58:14.166526778Z",
"provider": "osv",
"upstream": [
"CVE-2026-40612"
],
"references": [
"https://ubuntu.com/security/CVE-2026-40612",
"https://www.cve.org/CVERecord?id=CVE-2026-40612",
"https://github.com/jqlang/jq/security/advisories/GHSA-r7m6-x9c7-h69j"
]
},
"related_cves": [
{
"value": "CVE-2026-40612",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 358401,
"published_at": "2026-05-11T18:16:00+00:00"
}