What’s Vulnerable › Vulnerabilities

CVE-2026-25047: deepHas vulnerable to Prototype Pollution via constructor.prototype

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-29 · updated 2026-06-17
• Weakness: CWE-1321

Description

deepHas provides a test for the existence of a nested object key and optionally returns that key. A prototype pollution vulnerability exists in version 1.0.7 of the deephas npm package that allows an attacker to modify global object behavior. This issue was fixed in version 1.0.8.

Affected products

• sharpred deepHas: 1.0.7

References

• https://github.com/sharpred/deepHas/commit/8097fafd3776c613d8066546653e0d2c7b5fc465
• https://github.com/sharpred/deepHas/security/advisories/GHSA-2733-6c58-pf27

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