CVE-2024-27088
es5-ext Regular Expression Denial of Service in `function#copy` and `function#toStringTokens`
es5-ext contains ECMAScript 5 extensions. Passing functions with very long names or complex default argument names into function#copy or function#toStringTokens may cause the script to stall. The vulnerability is patched in v0.10.63.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
es5-ext Regular Expression Denial of Service in `function#copy` and `function#toStringTokens`
es5-ext contains ECMAScript 5 extensions. Passing functions with very long names or complex default argument names into function#copy or function#toStringTokens may cause the script to stall. The vulnerability is patched in v0.10.63.
- Record
CVE-2024-27088- CVSS 3.1
- 0.0 None
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:N - Weakness
- CWE-400, CWE-1333
- Updated
- 2026-11-02
EUVDEUVD-2024-0508
es5-ext contains ECMAScript 5 extensions. Passing functions with very long names or complex default argument names into function#copy or function#toStringTokens may cause the script to stall. The vulnerability is patched in v0.10.63.
- Record
EUVD-2024-0508- CVSS 3.1
- 0.0 None
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4gmj-3p3h-gm8hNo score
es5-ext vulnerable to Regular Expression Denial of Service in `function#copy` and `function#toStringTokens`
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
- Record
GHSA-4gmj-3p3h-gm8h- Weakness
- CWE-1333
- Updated
- 2026-11-02
NVD
es5-ext contains ECMAScript 5 extensions. Passing functions with very long names or complex default argument names into function#copy or function#toStringTokens may cause the script to stall. The vulnerability is patched in v0.10.63.
- Record
CVE-2024-27088- CVSS 3.1
- 0.0 None
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:N - CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400, CWE-1333
- Updated
- 2026-11-02
OSV
es5-ext Regular Expression Denial of Service in `function#copy` and `function#toStringTokens`
es5-ext contains ECMAScript 5 extensions. Passing functions with very long names or complex default argument names into function#copy or function#toStringTokens may cause the script to stall. The vulnerability is patched in v0.10.63.
- Record
CVE-2024-27088- CVSS 3.1
- 0.0 None
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:N - Weakness
- CWE-1333, CWE-400
- Updated
- 2026-11-11
OSVDEBIAN-CVE-2024-27088
es5-ext contains ECMAScript 5 extensions. Passing functions with very long names or complex default argument names into function#copy or function#toStringTokens may cause the script to stall. The vulnerability is patched in v0.10.63.
- Record
DEBIAN-CVE-2024-27088- CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2024-27088
es5-ext contains ECMAScript 5 extensions. Passing functions with very long names or complex default argument names into function#copy or function#toStringTokens may cause the script to stall. The vulnerability is patched in v0.10.63.
- Record
UBUNTU-CVE-2024-27088- CVSS 3.1
- 0.0 None
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:N - CVSS 3.1
- 5.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVCLSA-2026-1773793041No score
TuxCare security update for es5-ext (1 CVE)
TuxCare rebuilt es5-ext to address 1 CVE. Fixed in 0.10.7-tuxcare.1.
- Record
CLSA-2026-1773793041- Updated
- 2026-11-02
OSVCLSA-2026-1781139201No score
TuxCare security update for es5-ext (1 CVE)
TuxCare rebuilt es5-ext to address 1 CVE. Fixed in 0.10.46-tuxcare.1.
- Record
CLSA-2026-1781139201- Updated
- 2026-11-02
OSVGHSA-4gmj-3p3h-gm8hNo score
es5-ext vulnerable to Regular Expression Denial of Service in `function#copy` and `function#toStringTokens`
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
- Record
GHSA-4gmj-3p3h-gm8h- Weakness
- CWE-1333
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
es5-extnpm | 0.10.0 up to 0.10.63 | 0.10.63 |
es5-extTuxCare:npm | 0.10.7-tuxcare.0 up to 0.10.7-tuxcare.1, plus listed versions 0.10.7 | 0.10.7-tuxcare.1 |
es5-extTuxCare:npm | 0.10.46-tuxcare.0 up to 0.10.46-tuxcare.1, plus listed versions 0.10.46 | 0.10.46-tuxcare.1 |
node-es5-extDebian:12 | All versions, plus listed versions 0.10.62+dfsg1+~1.1.0-20.10.64+dfsg1+~1.1.0-10.10.64+dfsg1+~1.1.0-2 | None known |
node-es5-extDebian:13 | before 0.10.64+dfsg1+~1.1.0-1 | 0.10.64+dfsg1+~1.1.0-1 |
node-es5-extDebian:14 | before 0.10.64+dfsg1+~1.1.0-1 | 0.10.64+dfsg1+~1.1.0-1 |
node-es5-extUbuntu:18.04:LTS | All versions, plus listed versions 0.10.30-1 | None known |
node-es5-extUbuntu:20.04:LTS | All versions, plus listed versions 0.10.30-1 | None known |
node-es5-extUbuntu:22.04:LTS | All versions, plus listed versions 0.10.53+~1.1.0-10.10.53+~1.1.0-2 | None known |
node-es5-extUbuntu:24.04:LTS | All versions, plus listed versions 0.10.62+dfsg1+~1.1.0-2 | None known |
node-es5-extUbuntu:25.10 | All versions, plus listed versions 0.10.64+dfsg1+~1.1.0-2 | None known |
node-es5-extUbuntu:26.10 | All versions, plus listed versions 0.10.64+dfsg1+~1.1.0-2 | None known |
node-es5-extUbuntu:26.04:LTS | All versions, plus listed versions 0.10.64+dfsg1+~1.1.0-2 | None known |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | 200101WhoAmI/CVE-2024-27088 | 2024-08-21 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | OSV | |
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-27088 is a none vulnerability (CVSS 0.0) in Medikoo Es5-ext, published February 26, 2024. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.54%, the 45th percentile. Fixed in es5-ext 0.10.63.
References
github.com/medikoo/es5-ext/security/advisories/GHSA-4gmj-3p3h-gm8h
nvd.nist.gov/vuln/detail/CVE-2024-27088