High
zstd-jni-java — security advisory
zstd-jni versions before 1.5.7-14 fail to validate offset and length parameters in the ZstdDictCompress constructor, allowing out-of-bounds memory reads. Attackers can supply untrusted offset or length values to read native heap memory into the compression dictionary, typically causing JVM crashes.
- Products
- zstd-jni-java
- Affected versions
- 1.5.2-5+ds-3, 1.5.2-5+ds-3build1, 1.5.2-5+ds-7, 1.5.2-5+ds-7build1, 1.5.2-5+ds-7ubuntu1, 1.5.2-5+ds-8
- Fixed versions
- Not specified
- CVEs
- CVE-2026-87795
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:25 UTC · Revision 1
Source evidence
zstd-jni versions before 1.5.7-14 fail to validate offset and length parameters in the ZstdDictCompress constructor, allowing out-of-bounds memory reads. Attackers can supply untrusted offset or length values to read native heap memory into the compression dictionary, typically causing JVM crashes.
osv:UBUNTU-CVE-2026-87795
zstd-jni-java
Fixed versions: Not specified
zstd-jni-java
Fixed versions: Not specified
zstd-jni-java
Fixed versions: Not specified
Complete source record
{
"id": "8bd370ac27a5be11d5c32f246fb2cccf77e0fbea20c8ecba13ab48446bfff5f7",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-87795",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-87795",
"summary": "zstd-jni versions before 1.5.7-14 fail to validate offset and length parameters in the ZstdDictCompress constructor, allowing out-of-bounds memory reads. Attackers can supply untrusted offset or length values to read native heap memory into the compression dictionary, typically causing JVM crashes.",
"evidence": "osv:UBUNTU-CVE-2026-87795",
"products": [
{
"name": {
"value": "zstd-jni-java",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.5.2-5+ds-3",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.2-5+ds-3build1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "zstd-jni-java",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.5.2-5+ds-8",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "zstd-jni-java",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.5.2-5+ds-7",
"evidence": "/affected/2/versions"
},
{
"value": "1.5.2-5+ds-7build1",
"evidence": "/affected/2/versions"
},
{
"value": "1.5.2-5+ds-7ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.5.2-5+ds-8",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-87795",
"aliases": [
"UBUNTU-CVE-2026-87795"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zstd-jni-java",
"purl": "pkg:deb/ubuntu/zstd-jni-java?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.5.2-5+ds-3",
"1.5.2-5+ds-3build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87795.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzstd-jni-java",
"binary_version": "1.5.2-5+ds-3build1"
},
{
"binary_name": "libzstd-jni1",
"binary_version": "1.5.2-5+ds-3build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zstd-jni-java",
"purl": "pkg:deb/ubuntu/zstd-jni-java?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.5.2-5+ds-8"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87795.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzstd-jni-java",
"binary_version": "1.5.2-5+ds-8"
},
{
"binary_name": "libzstd-jni1",
"binary_version": "1.5.2-5+ds-8"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zstd-jni-java",
"purl": "pkg:deb/ubuntu/zstd-jni-java?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.5.2-5+ds-7",
"1.5.2-5+ds-7build1",
"1.5.2-5+ds-7ubuntu1",
"1.5.2-5+ds-8"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-87795.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libzstd-jni-java",
"binary_version": "1.5.2-5+ds-8"
},
{
"binary_name": "libzstd-jni1",
"binary_version": "1.5.2-5+ds-8"
}
]
}
}
],
"modified": "2026-10-17T13:01:14.967876093Z",
"provider": "osv",
"upstream": [
"CVE-2026-87795"
],
"references": [
"https://ubuntu.com/security/CVE-2026-87795",
"https://www.cve.org/CVERecord?id=CVE-2026-87795",
"https://github.com/luben/zstd-jni/security/advisories/GHSA-ff36-7w3w-g8rm"
]
},
"related_cves": [
{
"value": "CVE-2026-87795",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 361364,
"published_at": "2026-09-09T10:22:00+00:00"
}