How severe is GHSA-4qw4-jpp4-8gvp?

No CVSS score has been assigned to GHSA-4qw4-jpp4-8gvp yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-4qw4-jpp4-8gvp?

GHSA-4qw4-jpp4-8gvp affects the following packages: commonmarker (RubyGems). Ecosystems affected: RubyGems.

How do I fix GHSA-4qw4-jpp4-8gvp?

Update commonmarker to 0.23.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4qw4-jpp4-8gvp is resolved across your whole dependency graph.

How do I detect GHSA-4qw4-jpp4-8gvp in my RubyGems dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for commonmarker, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-4qw4-jpp4-8gvp if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is GHSA-4qw4-jpp4-8gvp actively exploited in the wild?

No public exploit code has been indexed for GHSA-4qw4-jpp4-8gvp yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-4qw4-jpp4-8gvp published, and has it been updated?

GHSA-4qw4-jpp4-8gvp was published on September 21, 2022 and was last updated on December 2, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

💎 RubyGems

Not in CISA KEV

Unbounded resource exhaustion in cmark-gfm autolink extension may lead to denial of serviceGHSA-4qw4-jpp4-8gvp

Fix: gjtorikian/commonmarker#190

GHSA-4qw4-jpp4-8gvp is a security vulnerability in commonmarker. A fix is available for commonmarker — see the affected versions and patch details below.

Published

Sep 21, 2022

Updated

Dec 2, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Dec 2, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

💎commonmarker

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.

Description

Impact

CommonMarker uses cmark-gfm for rendering Github Flavored Markdown. A polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service.

Patches

This vulnerability has been patched in the following CommonMarker release:

v0.23.6

Workarounds

Disable use of the autolink extension.

References

https://github.com/gjtorikian/commonmarker/pull/190 https://github.com/github/cmark-gfm/security/advisories/GHSA-cgh3-p57x-9q7q https://en.wikipedia.org/wiki/Time_complexity

For more information

If you have any questions or comments about this advisory:

Open an issue in github/cmark-gfm

Acknowledgements

We would like to thank Legit Security for reporting this vulnerability.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
💎RubyGems	`commonmarker`	all versions	0.23.6`bundle update commonmarker --conservative`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for commonmarker, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update commonmarker to 0.23.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4qw4-jpp4-8gvp is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

### Impact CommonMarker uses `cmark-gfm` for rendering [Github Flavored Markdown](https://github.github.com/gfm/). A polynomial time complexity issue in cmark-gfm's autolink extension may lead to unbounded resource exhaustion and subsequent denial of service. ### Patches This vulnerability has been patched in the following CommonMarker release: - v0.23.6 ### Workarounds Disable use of the autolink extension. ### References https://github.com/gjtorikian/commonmarker/pull/190 https://github.com/github/cmark-gfm/security/advisories/GHSA-cgh3-p57x-9q7q https://en.wikipedia.org/wiki/Time_co

O3 Security · Impact-Aware SCA

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