@xhmikosr/decompress: Path traversal via symlink chain
### Impact When extracting an untrusted archive with the default `decompress(input, output)` API, a crafted archive containing a chain of symlink entries can make a later entry resolve **outside** the output directory. The lexical containment checks pass, but the kernel follows the planted symlinks to a path outside `output`, letting an attacker write (and read) files outside the intended extraction directory. Overwriting startup scripts or configuration can lead to remote code execution. This is a bypass of the hardening in GHSA-mp2f-45pm-3cg9. Any application that extracts attacker-controlled archives is affected. ### Patches Fixed in **11.1.4** (`latest`) and backported to **10.2.2** (`release-v10` dist-tag). Upgrade to one of these. The unmaintained upstream `decompress` package shares this flaw and will not be patched. Migrate to `@xhmikosr/decompress@11.1.4` (or `@10.2.2`). ### Workarounds None. Do not extract untrusted archives on affected versions. If you cannot upgrade, validate entries out of band and reject any whose resolved path escapes the target directory.
GHSA-hrh2-vp3x-79xf
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:GHSA-hrh2-vp3x-79xf
@xhmikosr/decompress
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 11.1.4
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
@xhmikosr/decompress
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 10.2.2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
decompress
Source reference: /affected/2/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "11.0.0"
},
{
"fixed": "11.1.4"
}
]
}
],
"package": {
"name": "@xhmikosr/decompress",
"purl": "pkg:npm/%40xhmikosr/decompress",
"ecosystem": "npm"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-hrh2-vp3x-79xf/GHSA-hrh2-vp3x-79xf.json",
"last_known_affected_version_range": "<= 11.1.3"
}
},
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
},
{
"fixed": "10.2.2"
}
]
}
],
"package": {
"name": "@xhmikosr/decompress",
"purl": "pkg:npm/%40xhmikosr/decompress",
"ecosystem": "npm"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-hrh2-vp3x-79xf/GHSA-hrh2-vp3x-79xf.json",
"last_known_affected_version_range": "<= 10.2.1"
}
},
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
},
{
"last_affected": "4.2.1"
}
]
}
],
"package": {
"name": "decompress",
"purl": "pkg:npm/decompress",
"ecosystem": "npm"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-hrh2-vp3x-79xf/GHSA-hrh2-vp3x-79xf.json"
}
}
]- Related CVEs
- CVE-2026-101894
Source reference:
/aliases
Publisher severity
critical
Source reference: /database_specific/severity
- Event
- #33263 · Revision 1
- Added to Heist Feed
- Publisher date