Medium
zip4j — security advisory
Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.
- Products
- zip4j
- Affected versions
- 2.1.2-2, 2.11.5-1, 2.11.5-1build1, 2.11.6-1, 2.2.2-1, 2.2.6-1, 2.2.8-1, 2.6.4-1, 2.9.0-1, 2.9.1-1
- Fixed versions
- Not specified
- CVEs
- CVE-2023-22899
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:48 UTC · Revision 1
Source evidence
Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.
osv:UBUNTU-CVE-2023-22899
zip4j
Fixed versions: Not specified
zip4j
Fixed versions: Not specified
zip4j
Fixed versions: Not specified
zip4j
Fixed versions: Not specified
zip4j
Fixed versions: Not specified
zip4j
Fixed versions: Not specified
Complete source record
{
"id": "e28820fc1438083d8542e8ea4648869ff8ed4d36e3fc2d2d1a0b85f9e801f718",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2023-22899",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2023-22899",
"summary": "Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.",
"evidence": "osv:UBUNTU-CVE-2023-22899",
"products": [
{
"name": {
"value": "zip4j",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.1.2-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "2.2.8-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "zip4j",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.6.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.9.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.9.1-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "zip4j",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.11.5-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "zip4j",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.11.5-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "zip4j",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.11.6-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "zip4j",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.11.5-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.11.5-1build1",
"evidence": "/affected/5/versions"
},
{
"value": "2.11.6-1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2023-22899",
"aliases": [
"UBUNTU-CVE-2023-22899"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zip4j",
"purl": "pkg:deb/ubuntu/zip4j?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"2.1.2-2",
"2.2.2-1",
"2.2.6-1",
"2.2.8-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-22899.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzip4j-java",
"binary_version": "2.2.8-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zip4j",
"purl": "pkg:deb/ubuntu/zip4j?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.6.4-1",
"2.9.0-1",
"2.9.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-22899.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzip4j-java",
"binary_version": "2.9.1-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zip4j",
"purl": "pkg:deb/ubuntu/zip4j?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2.11.5-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-22899.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzip4j-java",
"binary_version": "2.11.5-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zip4j",
"purl": "pkg:deb/ubuntu/zip4j?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"2.11.5-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-22899.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzip4j-java",
"binary_version": "2.11.5-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zip4j",
"purl": "pkg:deb/ubuntu/zip4j?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.11.6-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-22899.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzip4j-java",
"binary_version": "2.11.6-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zip4j",
"purl": "pkg:deb/ubuntu/zip4j?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2.11.5-1",
"2.11.5-1build1",
"2.11.6-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-22899.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzip4j-java",
"binary_version": "2.11.6-1"
}
]
}
}
],
"modified": "2026-10-17T12:56:04.165157972Z",
"provider": "osv",
"upstream": [
"CVE-2023-22899"
],
"references": [
"https://ubuntu.com/security/CVE-2023-22899",
"https://breakingthe3ma.app/files/Threema-PST22.pdf",
"https://news.ycombinator.com/item?id=34316206",
"https://github.com/srikanth-lingala/zip4j/releases",
"https://breakingthe3ma.app",
"https://threema.ch/en/blog/posts/news-alleged-weaknesses-statement",
"https://www.cve.org/CVERecord?id=CVE-2023-22899"
]
},
"related_cves": [
{
"value": "CVE-2023-22899",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354749,
"published_at": "2023-01-10T02:15:00+00:00"
}