ALPINE-CVE-2026-47770
jq is a command-line JSON processor. Prior to 1.8.2, comparing two sufficiently deeply nested arrays with the == operator exhausts the C stack on jq's ordinary command-line surface, resulting in denial of service via stack exhaustion (uncontrolled recursion). The crash occurs in jq's recursive structural comparison code, with the recursion repeating through jvp_array_equal() and jv_equal() in src/jv.c when comparing deeply nested arrays; a nearby sort comparator path through jv_cmp() in src/jv_aux.c overflows the stack at a larger nesting depth from the same missing recursion guard. Anyone running jq comparisons on attacker-controlled deeply nested JSON values, or embedding jq in a context where untrusted data can reach the == comparison path, is affected. This vulnerability is fixed in 1.8.2.
ALPINE-CVE-2026-47770
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:ALPINE-CVE-2026-47770
jq
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 1.8.2-r0
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
jq
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 1.8.2-r0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
jq
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 1.8.2-r0
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.2-r0"
}
]
}
],
"package": {
"name": "jq",
"purl": "pkg:apk/alpine/jq?arch=source",
"ecosystem": "Alpine:v3.22"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-47770.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.2-r0"
}
]
}
],
"package": {
"name": "jq",
"purl": "pkg:apk/alpine/jq?arch=source",
"ecosystem": "Alpine:v3.23"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-47770.json"
},
"ecosystem_specific": {}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.2-r0"
}
]
}
],
"package": {
"name": "jq",
"purl": "pkg:apk/alpine/jq?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-47770.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54448 · Revision 1
- Added to Heist Feed
- Publisher date