How severe is CVE-2024-27088?

CVE-2024-27088 has a CVSS score of 0/10, rated NONE. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2024-27088?

CVE-2024-27088 affects the following packages: es5-ext (npm). Ecosystems affected: npm.

How do I fix CVE-2024-27088?

Update es5-ext to 0.10.63 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-27088 is resolved across your whole dependency graph.

How do I detect CVE-2024-27088 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for es5-ext, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2024-27088 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 CVE-2024-27088 actively exploited in the wild?

No public exploit code has been indexed for CVE-2024-27088 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.

What is the EPSS score for CVE-2024-27088?

CVE-2024-27088 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 46th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2024-27088?

CVE-2024-27088 is classified as Uncontrolled Resource Consumption (CWE-400), CWE-1333 (CWE-1333). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2024-27088 published, and has it been updated?

CVE-2024-27088 was published on February 26, 2024 and was last updated on November 11, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦

📦 npm

Not in CISA KEV

NONE severity

CVE-2024-27088 — es5-ext

NONEFix: medikoo/es5-ext@3551cdd

CVE-2024-27088 is a none-severity (CVSS 0) Uncontrolled Resource Consumption vulnerability in es5-ext. A fix is available for es5-ext — see the affected versions and patch details below.

es5-ext Regular Expression Denial of Service in `function#copy` and `function#toStringTokens`

Also known asGHSA-4gmj-3p3h-gm8h

Published

Feb 26, 2024

Updated

Nov 11, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2024-27088.

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk+0.00%

Lower risk than most CVEs46th percentile — riskier than 46% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

285other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

es5-extnpm

15.7Mdownloads / week

Description

Impact

Passing functions with very long names or complex default argument names into function#copy orfunction#toStringTokens may put script to stall

Patches

Fixed with https://github.com/medikoo/es5-ext/commit/3551cdd7b2db08b1632841f819d008757d28e8e2 and https://github.com/medikoo/es5-ext/commit/a52e95736690ad1d465ebcd9791d54570e294602 Published with v0.10.63

Workarounds

No real workaround aside of refraining from using above utilities.

References

https://github.com/medikoo/es5-ext/issues/201

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`es5-ext`	≥ 0.10.0&&< 0.10.63	0.10.63`npm install es5-ext@0.10.63`

Affected Products

1 product · 1 configurations

Application

es5-extmedikoo

≥ 0.10.0 && < 0.10.63

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for es5-ext, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update es5-ext to 0.10.63 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-27088 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 Passing functions with very long names or complex default argument names into `function#copy` or`function#toStringTokens` may put script to stall ### Patches Fixed with https://github.com/medikoo/es5-ext/commit/3551cdd7b2db08b1632841f819d008757d28e8e2 and https://github.com/medikoo/es5-ext/commit/a52e95736690ad1d465ebcd9791d54570e294602 Published with v0.10.63 ### Workarounds No real workaround aside of refraining from using above utilities. ### References https://github.com/medikoo/es5-ext/issues/201