CVE-2025-57330 web3-core-subscriptions has a Prototype Pollution vulnerability
Attackers can cause denial of service via prototype pollution in the web3-core-subscriptions library by injecting properties into Object.prototype.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-57330?
CVE-2025-57330 is a high-severity vulnerability in n/a, published on 24 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The web3-core-subscriptions is a package designed to manages web3 subscriptions. A Prototype Pollution vulnerability in the attachToObject function of web3-core-subscriptions version 1.10.4 and before allows attackers to inject properties on Object.prototype via supplying a crafted payload, causing denial of service (DoS) as the minimum consequence.
Weakness: CWE-1321
Which versions are affected by CVE-2025-57330?
2 open source packages ship an affected version, including web3-core-subscriptions. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
web3-core-subscriptions npm | All versions to 2.0.0-alpha.1 | None |
web3-core-subscriptions npm | All versions to 2.0.0-alpha.1 | None |
Products include Web3js Web3-Core-Subscriptions.
How do I fix CVE-2025-57330?
Upgrade to a fixed version.
Is CVE-2025-57330 being exploited?
There is no known exploitation of CVE-2025-57330 in the wild and no public exploit code.
Sources
Also known as CLSA-2026-1789040603, CLSA-2026-1792160945, CLSA-2026-1792161432, CLSA-2026-1792161488, CLSA-2026-1792161656, CLSA-2026-1792161673 and 16 more.