CVE catalog

CVE-2022-39209

cmark-gfm vulnerabilities

Severity: Medium
Published: Sep 15, 2022, 6:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 2.15% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	cmark-gfm	sid	`0.29.0.gfm.13-7.1`	fixed
Debian	cmark-gfm	forky	`0.29.0.gfm.13-7.1`	fixed
Debian	cmark-gfm	trixie	`0.29.0.gfm.13-4`	fixed
Debian	cmark-gfm	bookworm	`0.29.0.gfm.6-6`	fixed
Debian	ghostwriter	sid	`26.04.0+ds-1`	fixed
Debian	ghostwriter	forky	`26.04.0+ds-1`	fixed
Debian	ghostwriter	trixie	`25.04.0+ds-1`	fixed
Debian	ghostwriter	bookworm	`2.1.6+ds-2`	fixed
Debian	python-cmarkgfm	sid	`2025.10.22-2`	fixed
Debian	python-cmarkgfm	forky	`2025.10.22-2`	fixed
Debian	python-cmarkgfm	trixie	`2024.11.20-1`	fixed
Debian	python-cmarkgfm	bookworm	`0.8.0-3`	vulnerable
Debian	r-cran-commonmark	sid	`2.0.0-3`	fixed
Debian	r-cran-commonmark	forky	`2.0.0-3`	fixed
Debian	r-cran-commonmark	trixie	`1.9.5-1`	fixed
Debian	r-cran-commonmark	bookworm	`1.8.1-1`	fixed
Debian	ruby-commonmarker	sid	`2.10.1-1`	fixed
Debian	ruby-commonmarker	forky	`2.10.0-2`	fixed
Debian	ruby-commonmarker	trixie	`0.23.10-1`	fixed
Debian	ruby-commonmarker	bookworm	`0.23.6-1`	vulnerable
Ubuntu	python-cmarkgfm	noble	Not reported	vulnerable
Ubuntu	ruby-commonmarker	noble	Not reported	vulnerable
Ubuntu	cmark-gfm	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	fixed
Ubuntu	libcmark-gfm-dev	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	fixed
Ubuntu	libcmark-gfm-extensions-dev	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	fixed
Ubuntu	libcmark-gfm-extensions0.29.0.gfm.6	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	fixed
Ubuntu	libcmark-gfm0.29.0.gfm.6	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	fixed
Ubuntu	cmark-gfm	pro	`0.29.0.gfm.6-6`	vulnerable
Ubuntu	cmark-gfm	pro	`0.29.0.gfm.6-6build1`	vulnerable
Ubuntu	cmark-gfm	pro	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	fixed
Ubuntu	cmark-gfm	pro	`0.29.0.gfm.0-6`	vulnerable
Ubuntu	cmark-gfm	pro	`0.29.0.gfm.2-1`	vulnerable
Ubuntu	cmark-gfm	pro	`0.29.0.gfm.2-1+really.0.29.0.gfm.0ubuntu1`	vulnerable
Ubuntu	cmark-gfm	pro	`0.29.0.gfm.2-2`	vulnerable
Ubuntu	cmark-gfm	pro	`0.29.0.gfm.3-3`	vulnerable
Ubuntu	cmark-gfm	pro	`0.29.0.gfm.3-3ubuntu0.1~esm1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	cmark-gfm	source	sid	`0.29.0.gfm.6-2`	not yet assigned	Not reported	[1020588]
Debian	cmark-gfm	source	forky	`0.29.0.gfm.6-2`	not yet assigned	Not reported	[1020588]
Debian	cmark-gfm	source	trixie	`0.29.0.gfm.6-2`	not yet assigned	Not reported	[1020588]
Debian	cmark-gfm	source	bookworm	`0.29.0.gfm.6-2`	not yet assigned	Not reported	[1020588]
Debian	ghostwriter	source	sid	`2.1.6+ds-1`	unimportant	Not reported	Not reported
Debian	ghostwriter	source	forky	`2.1.6+ds-1`	unimportant	Not reported	Not reported
Debian	ghostwriter	source	trixie	`2.1.6+ds-1`	unimportant	Not reported	Not reported
Debian	ghostwriter	source	bookworm	`2.1.6+ds-1`	unimportant	Not reported	Not reported
Debian	python-cmarkgfm	source	sid	`2024.11.20-1`	not yet assigned	Not reported	[1034887]
Debian	python-cmarkgfm	source	forky	`2024.11.20-1`	not yet assigned	Not reported	[1034887]
Debian	python-cmarkgfm	source	trixie	`2024.11.20-1`	not yet assigned	Not reported	[1034887]
Debian	python-cmarkgfm	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1034887]
Debian	r-cran-commonmark	source	sid	`1.8.1-1`	not yet assigned	Not reported	Not reported
Debian	r-cran-commonmark	source	forky	`1.8.1-1`	not yet assigned	Not reported	Not reported
Debian	r-cran-commonmark	source	trixie	`1.8.1-1`	not yet assigned	Not reported	Not reported
Debian	r-cran-commonmark	source	bookworm	`1.8.1-1`	not yet assigned	Not reported	Not reported
Debian	ruby-commonmarker	source	sid	`0.23.10-1`	not yet assigned	Not reported	[1034888]
Debian	ruby-commonmarker	source	forky	`0.23.10-1`	not yet assigned	Not reported	[1034888]
Debian	ruby-commonmarker	source	trixie	`0.23.10-1`	not yet assigned	Not reported	[1034888]
Debian	ruby-commonmarker	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1034888]
Ubuntu	cmark-gfm	deb	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	Not reported	Not reported	Not reported
Ubuntu	libcmark-gfm-dev	deb	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	Not reported	Not reported	Not reported
Ubuntu	libcmark-gfm-extensions-dev	deb	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	Not reported	Not reported	Not reported
Ubuntu	libcmark-gfm-extensions0.29.0.gfm.6	deb	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	Not reported	Not reported	Not reported
Ubuntu	libcmark-gfm0.29.0.gfm.6	deb	noble	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	Not reported	Not reported	Not reported
Ubuntu	cmark-gfm	deb	pro	`0.29.0.gfm.6-6ubuntu0.24.04.1~esm1`	Not reported	USN-7319-1	Not reported
Ubuntu	cmark-gfm	deb	pro	`0.29.0.gfm.3-3ubuntu0.1~esm1`	Not reported	UBUNTU-CVE-2022-39209	Not reported

[Debian bug #1020588][Debian bug #1034887][Debian bug #1034888]

Notes

[bookworm] cmark-gfm: Minor issue [bookworm] python-cmarkgfm: Minor issue [bookworm] ruby-commonmarker: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-cmarkgfm]Affected
Source package: [python-cmarkgfm]
Details (2)
- 0.8.0-3 · amd64 · bookworm
  Affected
  usn · python-cmarkgfm · debian · bookworm
- 0.8.0-3 · arm64 · bookworm
  Affected
  usn · python-cmarkgfm · debian · bookworm
[ruby-commonmarker]Affected
Source package: [ruby-commonmarker]
Details (2)
- 0.23.6-1+b1 · amd64 · bookworm
  Affected
  usn · ruby-commonmarker · debian · bookworm
- 0.23.6-1+b1 · arm64 · bookworm
  Affected
  usn · ruby-commonmarker · debian · bookworm
[cmark-gfm]Fixed
Details (2)
- 0.29.0.gfm.6-6 · amd64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
- 0.29.0.gfm.6-6 · arm64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
[ghostwriter]Fixed
Details (2)
- 2.1.6+ds-2 · amd64 · bookworm
  Fixed · Fixed: 2.1.6+ds-1
  usn · ghostwriter · debian · bookworm
- 2.1.6+ds-2 · arm64 · bookworm
  Fixed · Fixed: 2.1.6+ds-1
  usn · ghostwriter · debian · bookworm
[libcmark-gfm0.29.0.gfm.6]Fixed
Source package: [cmark-gfm]
Details (2)
- 0.29.0.gfm.6-6 · amd64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
- 0.29.0.gfm.6-6 · arm64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
[libcmark-gfm-dev]Fixed
Source package: [cmark-gfm]
Details (2)
- 0.29.0.gfm.6-6 · amd64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
- 0.29.0.gfm.6-6 · arm64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
[libcmark-gfm-extensions0.29.0.gfm.6]Fixed
Source package: [cmark-gfm]
Details (2)
- 0.29.0.gfm.6-6 · amd64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
- 0.29.0.gfm.6-6 · arm64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
[libcmark-gfm-extensions-dev]Fixed
Source package: [cmark-gfm]
Details (2)
- 0.29.0.gfm.6-6 · amd64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
- 0.29.0.gfm.6-6 · arm64 · bookworm
  Fixed · Fixed: 0.29.0.gfm.6-2
  usn · cmark-gfm · debian · bookworm
[r-cran-commonmark]Fixed
Details (2)
- 1.8.1-1 · amd64 · bookworm
  Fixed · Fixed: 1.8.1-1
  usn · r-cran-commonmark · debian · bookworm
- 1.8.1-1 · arm64 · bookworm
  Fixed · Fixed: 1.8.1-1
  usn · r-cran-commonmark · debian · bookworm

Observed: Oct 23, 2026, 6:29:35 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Ubuntu Security Notices (USN)]