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CVE-2023-28626

24
FAUCET Score

CVE-2023-28626 is a denial-of-service vulnerability affecting the Comrak Markdown parser, stemming from quadratic parsing issues that allow specially crafted Markdown to consume excessive resources. This vulnerability carries a CVSS score of 7.5 (High), indicating it can be exploited remotely with low attack complexity to achieve a complete loss of availability. While no active exploitation or public exploit code is currently known, and community discussion is minimal, users are strongly advised to upgrade to Comrak version 0.17.0 to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.17.0CPE matchmatch criteria
cpe:2.3:a:comrak_project:comrak:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.12%
Probability of exploitation in next 30 days
EPSS Percentile
62.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0112 is in the 41st percentile among its peer group of 51,485 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

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rustpatch availablevia ghsa
Product: comrakFixed in: 0.17.0

Vendor Advisories (1)

rustGHSA-8hqf-xjwp-p67vmedium

Comrak vulnerable to quadratic runtime issues when parsing Markdown (GHSL-2023-047)

Mar 28, 2023

References

github.com / kivikakk/comrak/commit/ce795b7f471b01589f842dc09af38b025701178d
Patch
github.com / kivikakk/comrak/security/advisories/GHSA-8hqf-xjwp-p67v
Vendor Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/OUYME2VA555X6567H7ORIJQFN4BVGT6N
lists.fedoraproject.org / archives/list/[email protected]/message/PTWZWCT7KCX2KTXTLPUYZ3EHOONG4X46
lists.fedoraproject.org / archives/list/[email protected]/message/VQ3UBC7LE4VPCMZBTADIBL353CH7CPVV