Cubic catastrophic backtracking (ReDoS) in marked
Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may cause catastrophic backtracking against some strings and lead to a regular expression denial of service (ReDoS). Anyone who runs untrusted markdown through a vulnerable version of marked and does not use a worker with a time limit may be affected. This issue is patched in version 4.0.10. As a workaround, avoid running untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2022-21680
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 15:54 UTC · Revision 1
Source evidence
Cubic catastrophic backtracking (ReDoS) in marked
core-osv · Original sourcePublished 14 Jan 2022, 00:00 UTC
Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may cause catastrophic backtracking against some strings and lead to a regular expression denial of service (ReDoS). Anyone who runs untrusted markdown through a vulnerable version of marked and does not use a worker with a time limit may be affected. This issue is patched in version 4.0.10. As a workaround, avoid running untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.
osv:CVE-2022-21680
Complete source record
{
"id": "ca67a0a036fe2bb8414ef11381f64cad7ae2f0bb312c397eb3aa231104da0614",
"url": "https://osv.dev/vulnerability/CVE-2022-21680",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Cubic catastrophic backtracking (ReDoS) in marked",
"summary": "Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may cause catastrophic backtracking against some strings and lead to a regular expression denial of service (ReDoS). Anyone who runs untrusted markdown through a vulnerable version of marked and does not use a worker with a time limit may be affected. This issue is patched in version 4.0.10. As a workaround, avoid running untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.",
"evidence": "osv:CVE-2022-21680",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2022-21680",
"aliases": [
"CVE-2022-21680",
"GHSA-rrrm-qjm4-v8hf"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/markedjs/marked",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "ae01170085e89ccd85c233547011eb88420a90cf"
},
{
"fixed": "c4a3ccd344b6929afa8a1d50ac54a721e57012c0"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:marked_project:marked:*:*:*:*:*:node.js:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "4.0.10"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "c4a3ccd344b6929afa8a1d50ac54a721e57012c0"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "ae01170085e89ccd85c233547011eb88420a90cf"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v4.0.10"
}
]
}
}
],
"versions": [
"v4.0.9",
"v4.0.8",
"v4.0.7",
"v4.0.6",
"v4.0.5",
"v4.0.4",
"v4.0.3",
"v4.0.2",
"v4.0.1",
"v4.0.0",
"v3.0.8",
"v3.0.7",
"v3.0.6",
"v3.0.5",
"v3.0.4",
"v3.0.3",
"v3.0.2",
"v3.0.1",
"v3.0.0",
"v2.1.3",
"v2.1.2",
"v2.1.1",
"v2.1.0",
"v2.0.7",
"v2.0.6",
"v2.0.5",
"v2.0.4",
"v2.0.3",
"v2.0.2",
"v2.0.1",
"v2.0.0",
"v1.2.9",
"v1.2.8",
"v1.2.7",
"v1.2.6",
"v1.2.5",
"v1.2.4",
"v1.2.3",
"v1.2.2",
"v1.2.1",
"v1.1.2",
"v1.20",
"v1.1.1",
"v1.1.0",
"v1.0.0",
"v0.8.2",
"v0.8.1",
"v0.8.0",
"v0.7.0",
"v0.6.3",
"v0.6.2",
"v0.6.1",
"v0.6.0",
"v0.5.2",
"v0.5.1",
"v0.5.0",
"0.4.0",
"v0.3.19",
"v0.3.18",
"v0.3.17",
"0.3.15",
"0.3.14",
"v0.3.12",
"0.3.9",
"v0.3.7",
"v0.3.6",
"v0.3.5",
"v0.3.4",
"v0.3.3",
"v0.3.2",
"v0.3.1",
"v0.3.0",
"v0.2.10",
"v0.2.9",
"v0.2.8",
"v0.2.7",
"v0.2.6",
"v0.2.5",
"v0.2.4",
"v0.2.3",
"v0.2.2",
"v0.2.1",
"v0.2.0",
"v0.1.9",
"v0.1.8",
"v0.1.7",
"v0.1.6",
"v0.1.5",
"v0.1.4",
"v0.1.3",
"v0.1.2",
"v0.1.1",
"v0.1.0",
"v0.0.9",
"v0.0.8",
"v0.0.7",
"v0.0.6",
"v0.0.5",
"v0.0.4",
"v0.0.3",
"v0.0.2",
"v0.0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-21680.json"
}
}
],
"modified": "2026-10-28T02:30:30.323214121Z",
"provider": "osv",
"references": [
"https://github.com/markedjs/marked/releases/tag/v4.0.10",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21680.json",
"https://github.com/markedjs/marked/security/advisories/GHSA-rrrm-qjm4-v8hf",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AIXDMC3CSHYW3YWVSQOXAWLUYQHAO5UX/",
"https://nvd.nist.gov/vuln/detail/CVE-2022-21680",
"https://github.com/markedjs/marked/commit/c4a3ccd344b6929afa8a1d50ac54a721e57012c0"
],
"provider_metadata": {
"cwe_ids": [
"CWE-1333",
"CWE-400"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21680.json"
}
},
"related_cves": [
{
"value": "CVE-2022-21680",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 497042,
"published_at": "2022-01-14T00:00:00+00:00"
}