What is GHSA-6CHW-6FRG-F759?

GHSA-6CHW-6FRG-F759 is a high-severity uncontrolled resource consumption vulnerability in acorn (npm), affecting versions >= 6.0.0, < 6.4.1. It is fixed in 6.4.1, 7.1.1, 5.7.4. Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service.

How severe is GHSA-6CHW-6FRG-F759?

GHSA-6CHW-6FRG-F759 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of acorn are affected by GHSA-6CHW-6FRG-F759?

acorn (npm) versions >= 6.0.0, < 6.4.1 is affected.

Is there a fix for GHSA-6CHW-6FRG-F759?

Yes. GHSA-6CHW-6FRG-F759 is fixed in 6.4.1, 7.1.1, 5.7.4. Upgrade to this version or later.

Is GHSA-6CHW-6FRG-F759 exploitable, and should I be worried?

Whether GHSA-6CHW-6FRG-F759 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether GHSA-6CHW-6FRG-F759 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

GHSA-6CHW-6FRG-F759 in acorn

Q: How severe is GHSA-6CHW-6FRG-F759?

GHSA-6CHW-6FRG-F759 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of acorn are affected by GHSA-6CHW-6FRG-F759?

acorn (npm) versions >= 6.0.0, < 6.4.1 is affected.

Q: Is there a fix for GHSA-6CHW-6FRG-F759?

Yes. GHSA-6CHW-6FRG-F759 is fixed in 6.4.1, 7.1.1, 5.7.4. Upgrade to this version or later.

Q: Is GHSA-6CHW-6FRG-F759 exploitable, and should I be worried?

Whether GHSA-6CHW-6FRG-F759 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether GHSA-6CHW-6FRG-F759 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix GHSA-6CHW-6FRG-F759?

Upgrade: acorn to 6.4.1 or later, acorn to 7.1.1 or later, acorn to 5.7.4 or later.

Summary

Regular Expression Denial of Service in Acorn

Affected versions of acorn are vulnerable to Regular Expression Denial of Service.
A regex in the form of /[x-\ud800]/u causes the parser to enter an infinite loop.
The string is not valid UTF16 which usually results in it being sanitized before reaching the parser.
If an application processes untrusted input and passes it directly to acorn,
attackers may leverage the vulnerability leading to Denial of Service.

Impact

Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service. Typical impact: denial of service.

GHSA-6CHW-6FRG-F759 has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (6.4.1, 7.1.1, 5.7.4); upgrading removes the vulnerable code path.

Affected versions

acorn (>= 6.0.0, < 6.4.1) acorn (>= 7.0.0, < 7.1.1) acorn (>= 5.5.0, < 5.7.4)

Security releases

acorn → 6.4.1 (npm) acorn → 7.1.1 (npm) acorn → 5.7.4 (npm)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

Already deployed Kodem?

See it in your environment New to Kodem? Get a demo →

Remediation advice

Upgrade the following packages to resolve this vulnerability:

acorn to 6.4.1 or later; acorn to 7.1.1 or later; acorn to 5.7.4 or later

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is GHSA-6CHW-6FRG-F759? GHSA-6CHW-6FRG-F759 is a high-severity uncontrolled resource consumption vulnerability in acorn (npm), affecting versions >= 6.0.0, < 6.4.1. It is fixed in 6.4.1, 7.1.1, 5.7.4. Crafted input forces the application to consume excessive CPU, memory, or other resources, degrading or denying service.
How severe is GHSA-6CHW-6FRG-F759? GHSA-6CHW-6FRG-F759 has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of acorn are affected by GHSA-6CHW-6FRG-F759? acorn (npm) versions >= 6.0.0, < 6.4.1 is affected.
Is there a fix for GHSA-6CHW-6FRG-F759? Yes. GHSA-6CHW-6FRG-F759 is fixed in 6.4.1, 7.1.1, 5.7.4. Upgrade to this version or later.
Is GHSA-6CHW-6FRG-F759 exploitable, and should I be worried? Whether GHSA-6CHW-6FRG-F759 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether GHSA-6CHW-6FRG-F759 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix GHSA-6CHW-6FRG-F759?
- Upgrade acorn to 6.4.1 or later
- Upgrade acorn to 7.1.1 or later
- Upgrade acorn to 5.7.4 or later