CVE-2025-66453

Rhino vulnerable high CPU usage and potential DoS when passing specific numbers to toFixed() function

State: Published
Severity: 5.5 Medium
Published: Dec 3, 2025
Updated: Dec 3, 2025
Reserved: Dec 1, 2025

Description

Rhino is an open-source implementation of JavaScript written entirely in Java. Prior to 1.8.1, 1.7.15.1, and 1.7.14.1, when an application passed an attacker controlled float poing number into the toFixed() function, it might lead to high CPU consumption and a potential Denial of Service. Small numbers go through this call stack: NativeNumber.numTo > DToA.JS_dtostr > DToA.JS_dtoa > DToA.pow5mult where pow5mult attempts to raise 5 to a ridiculous power. This vulnerability is fixed in 1.8.1, 1.7.15.1, and 1.7.14.1.

Scores

CVSS	Score	Vector	Source
4.0	5.5 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P	GitHub_M

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
rhinomozilla	>= 1.8.0, < 1.8.1Affected >= 1.7.15, < 1.7.15.1Affected < 1.7.14.1Affected

References

https://github.com/mozilla/rhino/security/advisories/GHSA-3w8q-xq97-5j7x

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