ALPINE-CVE-2026-49839
jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error into invalid-state reuse and a real heap out-of-bounds write in assertion-disabled builds. When jv_load_file(raw=1) reads an attacker-controlled file, it repeatedly appends file chunks to the same jv string accumulator. Once jv_string_append_buf() returns jv_invalid_with_msg("String too long"), the raw-file loop does not stop. If the file contains at least one more byte, the next loop iteration appends a new chunk to an object that is already invalid. With assertions enabled this aborts in jvp_string_ptr(). With assertions disabled, the invalid object is interpreted as a string object and ASan reports heap-buffer-overflow. This vulnerability is fixed in 1.8.2.
ALPINE-CVE-2026-49839
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-2026-49839
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-2026-49839.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-2026-49839.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-2026-49839.json"
},
"ecosystem_specific": {}
}
]Publisher severity
No explicit severity was provided.
- Event
- #54486 · Revision 1
- Added to Heist Feed
- Publisher date