CVE-2026-25047 deepHas vulnerable to Prototype Pollution via constructor.prototype
An attacker can pollute the prototype in the deepHas npm library, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-25047?
CVE-2026-25047 is a critical vulnerability in sharpred deepHas, published on 29 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-1321
Which versions are affected by CVE-2026-25047?
2 open source packages ship an affected version, including deephas. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
deephas npm | All versions | 1.0.8 |
deephas npm | All versions | 1.0.8 |
Products include Sharpred Deephas.
How do I fix CVE-2026-25047?
Upgrade deephas to 1.0.8 or later.
Is CVE-2026-25047 being exploited?
There is no known exploitation of CVE-2026-25047 in the wild and no public exploit code.
Public exploit code: 1 Exploit-DB entry and 1 proofs of concept on GitHub.
Other vulnerabilities in sharpred deepHas
Sources
Also known as GHSA-2733-6c58-pf27.