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CVE-2023-37463

22
FAUCET Score

CVE-2023-37463 describes three polynomial time complexity issues in cmark-gfm, an extended version of the C reference implementation of CommonMark, affecting github cmark-gfm. These vulnerabilities can lead to unbounded resource exhaustion and denial of service. With a CVSS score of 7.5 (HIGH), the vulnerability is network-exploitable with low attack complexity, requiring no user interaction or privileges, and its primary impact is high availability loss. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.29.0.gfm.12CPE matchmatch criteria
cpe:2.3:a:github:cmark-gfm:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.4MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.70%
Probability of exploitation in next 30 days
EPSS Percentile
49.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0070 is in the 25th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / github/cmark-gfm/releases/tag/0.29.0.gfm.12
Release Notes
github.com / github/cmark-gfm/security/advisories/GHSA-w4qg-3vf7-m9x5
Exploit