Medium
Grav: Authenticated ReDoS via regex_replace in Twig Sandbox
Type: advisorySources: OSV
Grav is a file-based Web platform. Prior to 2.0.4, Grav allowlists the regex_replace filter and function in system/config/security.yaml, and GravExtension::regexReplace() passes an editor-controlled pattern directly to preg_replace(). When security.twig_content.process_enabled is enabled, an authenticated page editor can publish a catastrophically backtracking pattern that consumes PHP worker CPU and denies service to site visitors. This issue is fixed in version 2.0.4.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-62237, CVE-2026-62672
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 18:46 UTC · Revision 1
Source evidence
Grav: Authenticated ReDoS via regex_replace in Twig Sandbox
core-osv · Original sourcePublished 19 Aug 2026, 15:44 UTC
Grav is a file-based Web platform. Prior to 2.0.4, Grav allowlists the regex_replace filter and function in system/config/security.yaml, and GravExtension::regexReplace() passes an editor-controlled pattern directly to preg_replace(). When security.twig_content.process_enabled is enabled, an authenticated page editor can publish a catastrophically backtracking pattern that consumes PHP worker CPU and denies service to site visitors. This issue is fixed in version 2.0.4.
osv:CVE-2026-62672
Complete source record
{
"id": "08b9726c4cbc425a948003eaf8f1561aeebe877e3eb069041e790017da24bf23",
"url": "https://osv.dev/vulnerability/CVE-2026-62672",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Grav: Authenticated ReDoS via regex_replace in Twig Sandbox",
"summary": "Grav is a file-based Web platform. Prior to 2.0.4, Grav allowlists the regex_replace filter and function in system/config/security.yaml, and GravExtension::regexReplace() passes an editor-controlled pattern directly to preg_replace(). When security.twig_content.process_enabled is enabled, an authenticated page editor can publish a catastrophically backtracking pattern that consumes PHP worker CPU and denies service to site visitors. This issue is fixed in version 2.0.4.",
"evidence": "osv:CVE-2026-62672",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-62672",
"aliases": [
"CVE-2026-62237",
"CVE-2026-62672",
"GHSA-37f3-6p89-6qr9"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/getgrav/grav",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "c22d77d2ec2a9202d9f005f4ceda9c1483921286"
},
{
"fixed": "907116268ad4f48be7472c57f64981918578599a"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.0.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "907116268ad4f48be7472c57f64981918578599a"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "c22d77d2ec2a9202d9f005f4ceda9c1483921286"
}
],
"source": "REFERENCES_TAG",
"original_tag": "2.0.4"
}
]
}
}
],
"versions": [
"2.0.3",
"2.0.2",
"2.0.1",
"2.0.0",
"1.7.53",
"1.7.52",
"1.7.51",
"1.7.39.1",
"1.7.39",
"1.7.38",
"1.7.37.1",
"1.7.37",
"1.7.36",
"1.7.35",
"1.7.34",
"1.7.33",
"1.7.32",
"1.7.31",
"1.7.30",
"1.7.29.1",
"1.7.29",
"1.7.28",
"1.7.27.1",
"1.7.27",
"1.7.26.1",
"1.7.26",
"1.7.25",
"1.7.24",
"1.7.23",
"1.7.22",
"1.7.21",
"1.7.20",
"1.7.19",
"1.7.18",
"1.7.17",
"1.7.16",
"1.7.15",
"1.7.14",
"1.7.13",
"1.7.12",
"1.7.10",
"1.7.9",
"1.7.8",
"1.7.7",
"1.7.6",
"1.7.5",
"1.7.4",
"1.7.3",
"1.7.1",
"1.7.0",
"1.7.0-rc.20",
"1.7.0-rc.19",
"1.7.0-rc.18",
"1.7.0-rc.17",
"1.7.0-rc.15",
"1.7.0-rc.14",
"1.7.0-rc.13",
"1.7.0-rc.12",
"1.7.0-rc.10",
"1.7.0-rc.9",
"1.7.0-rc.8",
"1.7.0-rc.7",
"1.7.0-rc.6",
"1.7.0-rc.5",
"1.7.0-rc.4",
"1.7.0-rc.3",
"1.7.0-rc.2",
"1.7.0-rc.1",
"1.7.0-beta.10",
"1.7.0-beta.9",
"1.7.0-beta.8",
"1.7.0-beta.7",
"1.7.0-beta.6",
"1.7.0-beta.5",
"1.7.0-beta.4",
"1.7.0-beta.3",
"1.7.0-beta.2",
"1.7.0-beta.1",
"1.6.0-rc.4",
"1.6.0-rc.3",
"1.6.0-rc.2",
"1.6.0-rc.1",
"1.6.0-beta.8",
"1.6.0-beta.7",
"1.6.0-beta.6",
"1.6.0-beta.5",
"1.6.0-beta.2",
"1.6.0-beta.1",
"1.5.0-rc.1",
"1.5.0-beta.2",
"1.5.0-beta.1",
"1.3.0-rc.5",
"1.3.0-rc.4",
"1.3.0-rc.3",
"1.3.0-rc.1",
"1.2.0-rc.3",
"1.2.0-rc.2",
"1.2.0-rc.1",
"1.1.9-rc.3",
"1.1.9-rc.2",
"1.1.9-rc.1",
"1.1.0-rc.3",
"1.1.0-rc.2",
"1.1.0-rc.1",
"1.1.0-beta.5",
"1.1.0-beta.4",
"1.1.0-beta.3",
"1.1.0-beta.2",
"1.1.0-beta.1",
"0.9.19",
"0.9.18",
"0.9.17",
"0.9.16",
"0.9.15",
"0.9.14",
"0.9.13",
"0.9.12",
"0.9.11",
"0.9.10",
"0.9.9",
"0.9.8",
"0.9.7",
"0.9.6",
"0.9.5",
"0.9.4",
"0.9.3",
"0.9.2",
"0.9.0",
"0.8.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62672.json"
}
}
],
"modified": "2026-10-28T02:30:22.442274697Z",
"provider": "osv",
"references": [
"https://github.com/getgrav/grav/releases/tag/2.0.4",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62672.json",
"https://github.com/getgrav/grav/security/advisories/GHSA-37f3-6p89-6qr9",
"https://nvd.nist.gov/vuln/detail/CVE-2026-62672",
"https://github.com/getgrav/grav/commit/907116268ad4f48be7472c57f64981918578599a"
],
"provider_metadata": {
"cwe_ids": [
"CWE-1333"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62672.json"
}
},
"related_cves": [
{
"value": "CVE-2026-62237",
"evidence": "/aliases"
},
{
"value": "CVE-2026-62672",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 488700,
"published_at": "2026-08-19T15:44:36.287+00:00"
}