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Advisory record · GHSA-3w8q-xq97-5j7x

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

CVSS 5.5 MediumEPSS 0.0029 · 21st percentile

Published by the GitHub Advisory Database at 3 Dec 2025, 16:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.mozilla:rhinoMaven<1.7.14.1 || >=1.7.15, <1.7.15.1 || >=1.8.0, <1.8.11.7.14.1, 1.7.15.1, 1.8.1
Identifiers
GHSA-3w8q-xq97-5j7x · CVE-2025-66453
Weakness (CWE)
CWE-400
Tags
Published
3 Dec 2025
Updated
5 Dec 2025

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Rhino versions before 1.7.14.1, from 1.7.15 before 1.7.15.1, and before 1.8.1 are affected. If an application passes an attacker-controlled floating-point number into the toFixed() function, the attacker can cause high CPU consumption and a denial of service. Upgrade to Rhino 1.7.14.1, 1.7.15.1, or 1.8.1.

Written 7 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.5 Medium 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0029, the 21st percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:09 UTC First seen by agentprime
  2. 31 Oct 2026, 15:09 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.