How severe is GHSA-ch52-vgq2-943f?

No CVSS score has been assigned to GHSA-ch52-vgq2-943f yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-ch52-vgq2-943f?

GHSA-ch52-vgq2-943f affects the following packages: marked (npm). Ecosystems affected: npm.

How do I fix GHSA-ch52-vgq2-943f?

Update marked to 0.7.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-ch52-vgq2-943f is resolved across your whole dependency graph.

How do I detect GHSA-ch52-vgq2-943f in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for marked. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate GHSA-ch52-vgq2-943f if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-ch52-vgq2-943f?

O3 pinpoints whether GHSA-ch52-vgq2-943f is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-ch52-vgq2-943f actively exploited in the wild?

No public exploit code has been indexed for GHSA-ch52-vgq2-943f 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-ch52-vgq2-943f published, and has it been updated?

GHSA-ch52-vgq2-943f was published on September 3, 2020 and was last updated on August 31, 2020. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

GHSA-ch52-vgq2-943f

GHSA-ch52-vgq2-943f is a security vulnerability in marked. O3 Security confirms whether GHSA-ch52-vgq2-943f is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Regular Expression Denial of Service in marked

Published

Sep 3, 2020

Updated

Aug 31, 2020

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.

markednpm

60.4Mdownloads / week

Description

Affected versions of marked are vulnerable to Regular Expression Denial of Service (ReDoS). The _label subrule may significantly degrade parsing performance of malformed input.

Recommendation

Upgrade to version 0.7.0 or later.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`marked`	≥ 0.4.0&&< 0.7.0	0.7.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for marked. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update marked to 0.7.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-ch52-vgq2-943f is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-ch52-vgq2-943f is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-ch52-vgq2-943f. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Affected versions of `marked` are vulnerable to Regular Expression Denial of Service (ReDoS). The `_label` subrule may significantly degrade parsing performance of malformed input. ## Recommendation Upgrade to version 0.7.0 or later.

O3 Security · Impact-Aware SCA

Is GHSA-ch52-vgq2-943f in your dependencies?

O3 detects GHSA-ch52-vgq2-943f across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works