High severity · published Jan 24, 2023
CVE-2023-22486
cmark-gfm Quadratic complexity bug in handle_close_bracket may lead to a denial of service
7.5
CVSS
1.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cmark-gfm · github
< 0.29.0.gfm.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-22486
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-22486
Exploit
https://github.com/github/cmark-gfm/security/advisories/GHSA-r572-jvj2-3m8p
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