CVE-2022-39209

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.7%, top 25% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the patch by running python3 -c 'print("![l"* 100000 + "\n")' | ./cmark-gfm -e autolink, which will resource exhaust on unpatched cmark-gfm but render correctly on patched cmark-gfm. This vulnerability has been patched in 0.29.0.gfm.6. Users are advised to upgrade. Users unable to upgrade should disable the use of the autolink extension.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation2% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
76%
KEV
Not listed

Published

September 15, 2022

Last Modified

November 21, 2024

References (12)

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibcmark-gfm0.29.0.gfm.6 (0.29.0.gfm.6-6ubuntu0.24.10.1) @ oracular2026-05-25ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(20 across 4 ecosystems)
Debian:11(5)
PackageVulnerable rangeFixed inDependents
cmark-gfm0.29.0.gfm.0-6 ... 0.29.0.gfm.6-6 (16 versions)——
ghostwriter1.8.1-2 ... 26.04.0+ds-1 (15 versions)——
python-cmarkgfm0.4.2-1 ... 2025.10.22-2 (8 versions)——
r-cran-commonmark1.7-2 ... 2.0.0-2 (10 versions)——
ruby-commonmarker0.21.0-1 ... 2.8.3-1 (11 versions)——
Debian:12(5)
PackageVulnerable rangeFixed inDependents
cmark-gfm—0.29.0.gfm.6-2—
ghostwriter—2.1.6+ds-1—
python-cmarkgfm0.8.0-3, 2024.11.20-1, 2025.10.22-1, 2025.10.22-2——
r-cran-commonmark—1.8.1-1—
ruby-commonmarker0.23.10-1, 0.23.6-1, 0.23.9-1, 2.8.3-1——
Debian:13(5)
PackageVulnerable rangeFixed inDependents
cmark-gfm—0.29.0.gfm.6-2—
ghostwriter—2.1.6+ds-1—
python-cmarkgfm—2024.11.20-1—
r-cran-commonmark—1.8.1-1—
ruby-commonmarker—0.23.10-1—
Debian:14(5)
PackageVulnerable rangeFixed inDependents
cmark-gfm—0.29.0.gfm.6-2—
ghostwriter—2.1.6+ds-1—
python-cmarkgfm—2024.11.20-1—
r-cran-commonmark—1.8.1-1—
ruby-commonmarker—0.23.10-1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 147 total refreshes for this CVE.

  1. 2026-08-25 13:46 UTCEPSS rescore
  2. 2026-08-24 14:13 UTCEPSS rescore
  3. 2026-08-23 00:17 UTCEPSS rescore
  4. 2026-08-21 23:46 UTCEPSS rescore
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  7. 2026-08-19 17:01 UTCEPSS rescore
  8. 2026-08-18 14:43 UTCOSV refresh
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  1. 2026-08-04 10:35 UTCEPSS rescore
  2. 2026-08-03 10:27 UTCOSV refresh
  3. 2026-08-02 02:24 UTCEPSS rescore
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  5. 2026-07-30 16:25 UTCEPSS rescore
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  9. 2026-07-26 14:52 UTCEPSS rescore
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  15. 2026-07-23 02:13 UTCEG score recompute
  16. 2026-07-22 23:00 UTCEG score recompute
  17. 2026-07-22 14:06 UTCEPSS rescore
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  21. 2026-07-20 17:05 UTCEPSS rescore
  22. 2026-07-19 14:29 UTCEPSS rescore
  23. 2026-07-19 02:27 UTCEPSS rescore
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  25. 2026-07-18 10:03 UTCEPSS rescore
  26. 2026-07-18 10:03 UTCEPSS rescore
  27. 2026-07-16 20:04 UTCOSV refresh
  28. 2026-07-16 17:00 UTCEPSS rescore
  29. 2026-07-15 16:56 UTCEPSS rescore
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  31. 2026-07-15 01:58 UTCEPSS rescore
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  37. 2026-07-11 08:25 UTCEPSS rescore
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  40. 2026-07-07 13:44 UTCEPSS rescore
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  48. 2026-07-01 15:04 UTCEPSS rescore
  49. 2026-06-30 23:20 UTCEPSS rescore
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  51. 2026-06-29 14:04 UTCEPSS rescore
  52. 2026-06-28 18:32 UTCOSV refresh
  53. 2026-06-28 14:06 UTCEPSS rescore
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  74. 2026-06-17 17:51 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2022-39209?
CVE-2022-39209 is a high vulnerability published on September 15, 2022. cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. In versions prior to 0.29.0.gfm.6 a polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. Users may verify the…
When was CVE-2022-39209 disclosed?
CVE-2022-39209 was first published in the National Vulnerability Database on September 15, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-39209 actively exploited?
CVE-2022-39209 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 24.4% of all scored CVEs.
What is the CVSS score of CVE-2022-39209?
CVE-2022-39209 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2022-39209?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-39209, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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