How severe is CVE-2023-22486?

CVE-2023-22486 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2023-22486 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-22486?

CVE-2023-22486 affects Github Cmark-gfm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-22486?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-22486 published?

CVE-2023-22486 was published on 2023-01-26 and last updated on 2026-06-17.

CVE-2023-22486

CVE-2023-22486 is a low-severity vulnerability in Github Cmark-gfm with a CVSS 3.x base score of 3.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Github Cmark-gfm
Published: 2023-01-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-22486?: 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.
How severe is CVE-2023-22486?: CVE-2023-22486 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2023-22486 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-22486?: CVE-2023-22486 affects Github Cmark-gfm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-22486?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-22486 published?: CVE-2023-22486 was published on 2023-01-26 and last updated on 2026-06-17.

References

https://github.com/github/cmark-gfm/security/advisories/GHSA-r572-jvj2-3m8p

Affected products (1)

cpe:2.3:a:github:cmark-gfm:*:*:*:*:*:*:*:*

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