What’s Vulnerable › Vulnerabilities

CVE-2024-21524

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-07-10 · updated 2026-06-17
• Weakness: CWE-125

Description

All versions of the package node-stringbuilder are vulnerable to Out-of-bounds Read due to incorrect memory length calculation, by calling ToBuffer, ToString, or CharAt on a StringBuilder object with a non-empty string value input. It's possible to return previously allocated memory, for example, by providing negative indexes, leading to an Information Disclosure.

Affected products

• node-stringbuilder: through 2.2.7

References

• https://gist.github.com/dellalibera/0bb022811224f81d998fa61c3175ee67
• https://github.com/magiclen/node-stringbuilder/blob/5c2797d3d6bf8cb6d10fe1e077609cef9a5a7de0/src/node-stringbuilder.c%23L1281
• https://security.snyk.io/vuln/SNYK-JS-NODESTRINGBUILDER-6421617
• https://gist.github.com/dellalibera/0bb022811224f81d998fa61c3175ee67
• https://github.com/magiclen/node-stringbuilder/blob/5c2797d3d6bf8cb6d10fe1e077609cef9a5a7de0/src/node-stringbuilder.c%23L1281
• https://security.snyk.io/vuln/SNYK-JS-NODESTRINGBUILDER-6421617

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