CVE-2025-63704 query-parser-string is vulnerable to Prototype Pollution
Attackers can pollute object prototypes via unsanitized query parameters, potentially leading to code execution or privilege escalation in applications using this library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-63704?
CVE-2025-63704 is a critical vulnerability in n/a, published on 7 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
NPM package query-parser-string 1.0.0 is vulnerable to Prototype Pollution. The package does not properly sanitize user supplied query parameters and merges them to the newly created object.
Weakness: CWE-1321
Which versions are affected by CVE-2025-63704?
2 open source packages ship an affected version, including query-string-parser.
| Package | Affected | Fixed in |
|---|---|---|
query-string-parser npm | All versions | None |
query-string-parser npm | All versions | None |
How do I fix CVE-2025-63704?
No fix has been published for CVE-2025-63704 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-63704 being exploited?
There is no known exploitation of CVE-2025-63704 in the wild and no public exploit code.
Sources
Also known as GHSA-587p-w43q-4hjx.