CVE-2025-9287
cipher-base: Cipher-base hash manipulation
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · August 21, 2025
Updated · October 27, 2026
Description
An improper input validation vulnerability was found in the cipher-base npm package. Missing input type checks in the polyfill of the Node.js createHash function result in invalid value calculations, hanging and rewinding the hash state, including turning a tagged hash into an untagged hash, for malicious JSON-stringifyable inputs.
CVSS score applicability
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.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
CVSS / CWE
CVSS 3.1 · 7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L
CWE-20 · Improper Input Validation