CVE-2023-37463

low-risk
Published 2023-07-13

cmark-gfm is an extended version of the C reference implementation of CommonMark, a rationalized version of Markdown syntax with a spec. Three polynomial time complexity issues in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. These vulnerabilities have been patched in 0.29.0.gfm.12.

Do I need to act?

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0.21% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.4/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Cmark-Gfm

Affected Vendors

Github

References (4)

Release Notes https://github.com/github/cmark-gfm/releases/tag/0.29.0.gfm.12
Exploit https://github.com/github/cmark-gfm/security/advisories/GHSA-w4qg-3vf7-m9x5
Release Notes https://github.com/github/cmark-gfm/releases/tag/0.29.0.gfm.12
Exploit https://github.com/github/cmark-gfm/security/advisories/GHSA-w4qg-3vf7-m9x5
26
/ 100
low-risk
Severity 20/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal