High
smarty3, smarty4 — security advisory
Smarty before 4.5.8 and 5.x before 5.8.5 contains a code injection vulnerability where the top-level nocache_hash is never restored during extends:/multi-component template inheritance, leaving it null. Attackers can supply assigned data containing a forged SmartyNocache marker that is copied verbatim into the regenerated PHP cache file, executing arbitrary PHP on include for remote code execution.
- Products
- smarty3, smarty4
- Affected versions
- 3.1.47-2, 3.1.47-2+deb12u1, 3.1.48-1, 3.1.48-2, 4.3.0-1, 4.3.0-1+deb12u1, 4.3.0-1+deb12u2, 4.3.1-1, 4.5.4-1, 4.5.5-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-82531
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 02:54 UTC · Revision 1
Source evidence
Smarty before 4.5.8 and 5.x before 5.8.5 contains a code injection vulnerability where the top-level nocache_hash is never restored during extends:/multi-component template inheritance, leaving it null. Attackers can supply assigned data containing a forged SmartyNocache marker that is copied verbatim into the regenerated PHP cache file, executing arbitrary PHP on include for remote code execution.
osv:DEBIAN-CVE-2026-82531
smarty3
Fixed versions: Not specified
smarty3
Fixed versions: Not specified
smarty3
Fixed versions: Not specified
smarty4
Fixed versions: Not specified
smarty4
Fixed versions: Not specified
smarty4
Fixed versions: Not specified
Complete source record
{
"id": "17b4ad318c7ea06374317c4e4ebb18136adecdc0c5aeb50b48c40e0ab44468f9",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-82531",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-82531",
"summary": "Smarty before 4.5.8 and 5.x before 5.8.5 contains a code injection vulnerability where the top-level nocache_hash is never restored during extends:/multi-component template inheritance, leaving it null. Attackers can supply assigned data containing a forged SmartyNocache marker that is copied verbatim into the regenerated PHP cache file, executing arbitrary PHP on include for remote code execution.",
"evidence": "osv:DEBIAN-CVE-2026-82531",
"products": [
{
"name": {
"value": "smarty3",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.47-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.47-2+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.48-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.48-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "smarty3",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.48-2",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "smarty3",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.48-2",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "smarty4",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.0-1",
"evidence": "/affected/3/versions"
},
{
"value": "4.3.0-1+deb12u1",
"evidence": "/affected/3/versions"
},
{
"value": "4.3.0-1+deb12u2",
"evidence": "/affected/3/versions"
},
{
"value": "4.3.1-1",
"evidence": "/affected/3/versions"
},
{
"value": "4.5.4-1",
"evidence": "/affected/3/versions"
},
{
"value": "4.5.5-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "smarty4",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.5.5-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "smarty4",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.5.5-1",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-82531",
"aliases": [
"DEBIAN-CVE-2026-82531"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "smarty3",
"purl": "pkg:deb/debian/smarty3?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.1.47-2",
"3.1.47-2+deb12u1",
"3.1.48-1",
"3.1.48-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82531.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "smarty3",
"purl": "pkg:deb/debian/smarty3?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.1.48-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82531.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "smarty3",
"purl": "pkg:deb/debian/smarty3?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.1.48-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82531.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "smarty4",
"purl": "pkg:deb/debian/smarty4?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"4.3.0-1",
"4.3.0-1+deb12u1",
"4.3.0-1+deb12u2",
"4.3.1-1",
"4.5.4-1",
"4.5.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82531.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "smarty4",
"purl": "pkg:deb/debian/smarty4?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"4.5.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82531.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "smarty4",
"purl": "pkg:deb/debian/smarty4?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"4.5.5-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82531.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-07T05:00:14.028257707Z",
"provider": "osv",
"upstream": [
"CVE-2026-82531"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-82531"
]
},
"related_cves": [
{
"value": "CVE-2026-82531",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 93152,
"published_at": "2026-10-06T13:16:50.18+00:00"
}