CVE-2025-6545

A flaw was found in the npm pbkdf2 library, allowing signature spoofing. When executing in javascript engines other than Nodejs or Nodejs when importing pbkdf2/browser, certain algorithms will silently fail and return invalid data. The return values are predictable, which undermines the security guarantees of the package.

This flaw is rated important because it causes the pbkdf2 module to quietly return weak or zero-filled keys when certain algorithm names are used incorrectly in browsers or bundled code, this causes the function to silently return a predictable value (such as a zero-filled buffer or uninitialized memory) instead of a securely derived key, completely undermining the confidentiality and integrity of any cryptographic operation where attackers could guess or reuse these keys to access or change protected data.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.