What’s Vulnerable › Vulnerabilities

CVE-2023-26135

• Severity: critical (CVSS 9.8 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: 2023-06-30 · updated 2026-06-17
• Weakness: CWE-1321

Description

All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in the flatnest/nest.js file.

Affected products

• flatnest: all versions

References

• https://github.com/brycebaril/node-flatnest/blob/b7d97ec64a04632378db87fcf3577bd51ac3ee39/nest.js%23L43
• https://github.com/brycebaril/node-flatnest/commit/27d569baf9d9d25677640edeaf2d13af165868d6
• https://github.com/brycebaril/node-flatnest/issues/4
• https://security.snyk.io/vuln/SNYK-JS-FLATNEST-3185149
• https://github.com/brycebaril/node-flatnest/blob/b7d97ec64a04632378db87fcf3577bd51ac3ee39/nest.js%23L43
• https://github.com/brycebaril/node-flatnest/commit/27d569baf9d9d25677640edeaf2d13af165868d6
• https://github.com/brycebaril/node-flatnest/issues/4
• https://security.snyk.io/vuln/SNYK-JS-FLATNEST-3185149

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