Critical
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
- 3.1.21-1, 3.1.21-1ubuntu1, 3.1.21-1ubuntu1+esm1, 3.1.21-1ubuntu1+esm2, 3.1.31+20161214.1.c7d42e4+selfpack1-2, 3.1.31+20161214.1.c7d42e4+selfpack1-3, 3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1, 3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1+esm1, 3.1.33+20180830.1.3a78a21f+selfpack1-1, 3.1.34+20190228.1.c9f0de05+selfpack1-1, 3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1, 3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1+esm1, 3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1~esm1, 3.1.39-2, 3.1.39-2ubuntu1, 3.1.39-2ubuntu1.22.04.1, 3.1.39-2ubuntu1.22.04.2, 3.1.48-1, 3.1.48-1ubuntu0.24.04.1, 3.1.48-2, 3.1.48-2build1, 4.3.1-1, 4.3.1-1ubuntu0.24.04.1, 4.5.5-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-82531
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:21 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:UBUNTU-CVE-2026-82531
smarty3
Fixed versions: Not specified
smarty3
Fixed versions: Not specified
smarty3
Fixed versions: Not specified
smarty3
Fixed versions: Not specified
smarty3
Fixed versions: Not specified
smarty4
Fixed versions: Not specified
smarty3
Fixed versions: Not specified
smarty4
Fixed versions: Not specified
smarty3
Fixed versions: Not specified
smarty4
Fixed versions: Not specified
Complete source record
{
"id": "feb0c9a33a4f0114153c8c8419325b9eace1e38196be693f2e3ec76fbc65a01f",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-82531",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-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:UBUNTU-CVE-2026-82531",
"products": [
{
"name": {
"value": "smarty3",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.21-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.21-1ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "3.1.21-1ubuntu1+esm1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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},
{
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"affected_versions": [
{
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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},
{
"name": {
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"affected_versions": [
{
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{
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{
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{
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{
"value": "3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1+esm1",
"evidence": "/affected/2/versions"
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},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
},
{
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"evidence": "/affected/3/versions"
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{
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},
{
"name": {
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"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.48-1",
"evidence": "/affected/4/versions"
},
{
"value": "3.1.48-1ubuntu0.24.04.1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "smarty4",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.3.1-1",
"evidence": "/affected/5/versions"
},
{
"value": "4.3.1-1ubuntu0.24.04.1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "smarty3",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.48-2build1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
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"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.5.5-1",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
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"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.1.48-2",
"evidence": "/affected/8/versions"
},
{
"value": "3.1.48-2build1",
"evidence": "/affected/8/versions"
}
]
},
{
"name": {
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"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.5.5-1",
"evidence": "/affected/9/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2026-82531",
"aliases": [
"UBUNTU-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"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "smarty3",
"purl": "pkg:deb/ubuntu/smarty3?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"3.1.21-1",
"3.1.21-1ubuntu1",
"3.1.21-1ubuntu1+esm1",
"3.1.21-1ubuntu1+esm2"
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"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-82531.json"
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"ecosystem_specific": {
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"package": {
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"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"3.1.31+20161214.1.c7d42e4+selfpack1-2",
"3.1.31+20161214.1.c7d42e4+selfpack1-3",
"3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1",
"3.1.31+20161214.1.c7d42e4+selfpack1-3ubuntu0.1+esm1"
],
"database_specific": {
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"package": {
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"purl": "pkg:deb/ubuntu/smarty3?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"3.1.33+20180830.1.3a78a21f+selfpack1-1",
"3.1.34+20190228.1.c9f0de05+selfpack1-1",
"3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1~esm1",
"3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1",
"3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1+esm1"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
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"binary_version": "3.1.34+20190228.1.c9f0de05+selfpack1-1ubuntu0.1+esm1"
}
]
}
},
{
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"package": {
"name": "smarty3",
"purl": "pkg:deb/ubuntu/smarty3?arch=source&distro=jammy",
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"3.1.39-2ubuntu1",
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"ecosystem_specific": {
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"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"3.1.48-1",
"3.1.48-1ubuntu0.24.04.1"
],
"database_specific": {
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},
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"4.3.1-1ubuntu0.24.04.1"
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},
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},
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],
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},
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
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"3.1.48-2build1"
],
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},
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{
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}
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}
},
{
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}
]
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],
"package": {
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"4.5.5-1"
],
"database_specific": {
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},
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{
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}
}
],
"modified": "2026-10-17T13:01:12.158157098Z",
"provider": "osv",
"upstream": [
"CVE-2026-82531"
],
"references": [
"https://ubuntu.com/security/CVE-2026-82531",
"https://www.cve.org/CVERecord?id=CVE-2026-82531",
"https://github.com/smarty-php/smarty/security/advisories/GHSA-3w63-v7pm-cq9x"
]
},
"related_cves": [
{
"value": "CVE-2026-82531",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 361215,
"published_at": "2026-10-06T13:16:00+00:00"
}