path-to-regexp outputs backtracking regular expressions
path-to-regexp turns path strings into a regular expressions. In certain cases, path-to-regexp will output a regular expression that can be exploited to cause poor performance. Because JavaScript is single threaded and regex matching runs on the main thread, poor performance will block the event loop and lead to a DoS. The bad regular expression is generated any time you have two parameters within a single segment, separated by something that is not a period (.). For users of 0.1, upgrade to 0.1.10. All other users should upgrade to 8.0.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2024-45296, CVE-2026-4867
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 15:36 UTC · Revision 1
Source evidence
path-to-regexp outputs backtracking regular expressions
core-osv · Original sourcePublished 9 Sept 2024, 19:07 UTC
path-to-regexp turns path strings into a regular expressions. In certain cases, path-to-regexp will output a regular expression that can be exploited to cause poor performance. Because JavaScript is single threaded and regex matching runs on the main thread, poor performance will block the event loop and lead to a DoS. The bad regular expression is generated any time you have two parameters within a single segment, separated by something that is not a period (.). For users of 0.1, upgrade to 0.1.10. All other users should upgrade to 8.0.0.
osv:CVE-2024-45296
Complete source record
{
"id": "2be50424c0022c2f1925e7960fc2d3b112a924369e9220b90ae4d707c12a74f8",
"url": "https://osv.dev/vulnerability/CVE-2024-45296",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "path-to-regexp outputs backtracking regular expressions",
"summary": "path-to-regexp turns path strings into a regular expressions. In certain cases, path-to-regexp will output a regular expression that can be exploited to cause poor performance. Because JavaScript is single threaded and regex matching runs on the main thread, poor performance will block the event loop and lead to a DoS. The bad regular expression is generated any time you have two parameters within a single segment, separated by something that is not a period (.). For users of 0.1, upgrade to 0.1.10. All other users should upgrade to 8.0.0.",
"evidence": "osv:CVE-2024-45296",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2024-45296",
"aliases": [
"CVE-2024-45296",
"CVE-2026-4867",
"GHSA-37ch-88jc-xwx2",
"GHSA-9wv6-86v2-598j"
],
"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/pillarjs/path-to-regexp",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "c827fcea751b2e9ec6ca68a1b95a82e438728868"
},
{
"introduced": "1c24c4c16bee21a30298e5c41b6cbbef1f394cf2"
},
{
"fixed": "ed1095e0fa78a692e7f3d489e383e7bb1f9d2cc4"
},
{
"fixed": "29b96b4a1de52824e1ca0f49a701183cc4ed476f"
},
{
"fixed": "60f2121e9b66b7b622cc01080df0aabda9eedee6"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "0.1.10"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "0.2.0"
},
{
"fixed": "8.0.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "29b96b4a1de52824e1ca0f49a701183cc4ed476f"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "60f2121e9b66b7b622cc01080df0aabda9eedee6"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
"v6.2.2",
"v3.2.0",
"v7.1.0",
"v0.1.9",
"v0.1.8",
"v7.0.0",
"v0.1.7",
"v6.2.1",
"v6.2.0",
"v6.1.0",
"v6.0.0",
"v5.0.0",
"v4.0.5",
"v4.0.4",
"v4.0.3",
"v4.0.2",
"v4.0.1",
"v4.0.0",
"v3.1.0",
"v3.0.0",
"v2.4.0",
"v2.3.0",
"v2.2.1",
"v2.2.0",
"v2.1.0",
"v2.0.0",
"v1.7.0",
"v1.6.0",
"v1.5.3",
"v1.5.2",
"v1.5.1",
"v1.5.0",
"v1.4.0",
"v1.3.0",
"v1.2.1",
"v0.1.6",
"v0.1.5",
"v1.2.0",
"v1.1.1",
"v1.1.0",
"v0.1.4",
"v0.1.3",
"v1.0.3",
"v1.0.2",
"v1.0.1",
"v1.0.0",
"v0.2.5",
"v0.2.4",
"v0.2.3",
"v0.2.2",
"v0.2.1",
"v0.2.0",
"v0.1.2",
"v0.1.1",
"0.1.0",
"0.0.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-45296.json"
}
}
],
"modified": "2026-10-28T02:30:51.374084857Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/45xxx/CVE-2024-45296.json",
"https://github.com/pillarjs/path-to-regexp/security/advisories/GHSA-9wv6-86v2-598j",
"https://nvd.nist.gov/vuln/detail/CVE-2024-45296",
"https://security.netapp.com/advisory/ntap-20250124-0001/",
"https://github.com/pillarjs/path-to-regexp/commit/29b96b4a1de52824e1ca0f49a701183cc4ed476f",
"https://github.com/pillarjs/path-to-regexp/commit/60f2121e9b66b7b622cc01080df0aabda9eedee6"
],
"provider_metadata": {
"cwe_ids": [
"CWE-1333"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/45xxx/CVE-2024-45296.json"
}
},
"related_cves": [
{
"value": "CVE-2024-45296",
"evidence": "/id"
},
{
"value": "CVE-2026-4867",
"evidence": "/aliases"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 519776,
"published_at": "2024-09-09T19:07:40.313+00:00"
}