HighFix available
cmark, cmark-gfm — security advisory
cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. Versions prior to 0.29.0.gfm.7 contain a polynomial time complexity issue in handle_close_bracket that may lead to unbounded resource exhaustion and subsequent denial of service. This vulnerability has been patched in 0.29.0.gfm.7.
- Products
- cmark, cmark-gfm
- Affected versions
- 0.26.1-1, 0.28.3-1, 0.28.3.gfm.20-3, 0.29.0-1ubuntu2, 0.29.0-2, 0.29.0-4, 0.29.0.gfm.0-3, 0.29.0.gfm.0-4, 0.29.0.gfm.0-6, 0.29.0.gfm.2-1, 0.29.0.gfm.2-1+really.0.29.0.gfm.0ubuntu1, 0.29.0.gfm.2-2, 0.29.0.gfm.3-3, 0.29.0.gfm.6-6, 0.29.0.gfm.6-6build1, 0.30.2-3, 0.30.2-4, 0.30.2-5, 0.30.2-6, 0.30.2-6build1, 0.30.2-6build2
- Fixed versions
- 0.29.0.gfm.0-4ubuntu0.1~esm1, 0.29.0.gfm.3-3ubuntu0.1~esm1, 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1
- CVEs
- CVE-2023-22486
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:48 UTC · Revision 1
Source evidence
cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. Versions prior to 0.29.0.gfm.7 contain a polynomial time complexity issue in handle_close_bracket that may lead to unbounded resource exhaustion and subsequent denial of service. This vulnerability has been patched in 0.29.0.gfm.7.
osv:UBUNTU-CVE-2023-22486
cmark
Fixed versions: Not specified
cmark
Fixed versions: Not specified
cmark-gfm
Fixed versions: 0.29.0.gfm.0-4ubuntu0.1~esm1
cmark
Fixed versions: Not specified
cmark-gfm
Fixed versions: 0.29.0.gfm.3-3ubuntu0.1~esm1
cmark
Fixed versions: Not specified
cmark-gfm
Fixed versions: 0.29.0.gfm.6-6ubuntu0.24.04.1~esm1
cmark
Fixed versions: Not specified
cmark
Fixed versions: Not specified
cmark
Fixed versions: Not specified
Complete source record
{
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"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2023-22486",
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"modified": "2026-10-17T12:56:03.775139294Z",
"provider": "osv",
"upstream": [
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"references": [
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"https://github.com/github/cmark-gfm/security/advisories/GHSA-r572-jvj2-3m8p",
"https://www.cve.org/CVERecord?id=CVE-2023-22486",
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"value": "CVE-2023-22486",
"evidence": "/upstream"
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"source_id": "core-osv",
"document_id": 354735,
"published_at": "2023-01-26T21:18:00+00:00"
}