# CVE-2025-66453: rhino: Rhino is an open-source implementation of JavaScript written entirely in Java

CVE-2025-66453 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2025-66453, released December 3, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-66453
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0029
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 3, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rhino Debian 12.15 (bookworm) | 1.7.14.1-0+deb12u1 | [DEBIAN-CVE-2025-66453](https://patchblox.com/security/data/fix/linux/debian-cve-2025-66453.md) | Dec 3, 2025 |
| Linux | rhino Debian 13.5 (trixie) | 1.7.15.1-0.1~deb13u1 | [DEBIAN-CVE-2025-66453](https://patchblox.com/security/data/fix/linux/debian-cve-2025-66453.md) | Dec 3, 2025 |
| Linux | rhino Debian 14 | 1.7.15.1-0.1 | [DEBIAN-CVE-2025-66453](https://patchblox.com/security/data/fix/linux/debian-cve-2025-66453.md) | Dec 3, 2025 |
| Linux | rhino amzn 2023 | 1.7.14.1-3.amzn2023.0.1 | [ALAS2023-2025-1339](https://patchblox.com/security/data/fix/linux/alas2023-2025-1339.md) | Jan 7, 2026 |
| Linux | rhino opensuse-leap 15.6 | 1.7.15.1-150200.12.7.1 | [SUSE-SU-2025:4390-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4390-1.md) | Dec 12, 2025 |
| Linux | rhino opensuse-leap 16.0 | 1.7.15.1-160000.1.1 | [OPENSUSE-SU-2026:20297-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20297-1.md) | Mar 2, 2026 |
| Linux | rhino sles 15.6 | 1.7.15.1-150200.12.7.1 | [SUSE-SU-2025:4390-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4390-1.md) | Dec 12, 2025 |
| Linux | rhino sles 15.7 | 1.7.15.1-150200.12.7.1 | [SUSE-SU-2025:4390-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-4390-1.md) | Dec 12, 2025 |
| Linux | rhino sles 16.0 | 1.7.15.1-160000.1.1 | [SUSE-SU-2026:20603-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20603-1.md) | Mar 2, 2026 |
| Linux | rhino-engine amzn 2023 | 1.7.14.1-3.amzn2023.0.1 | [ALAS2023-2025-1339](https://patchblox.com/security/data/fix/linux/alas2023-2025-1339.md) | Jan 7, 2026 |
| Linux | rhino-javadoc amzn 2023 | 1.7.14.1-3.amzn2023.0.1 | [ALAS2023-2025-1339](https://patchblox.com/security/data/fix/linux/alas2023-2025-1339.md) | Jan 7, 2026 |
| Linux | rhino-runtime amzn 2023 | 1.7.14.1-3.amzn2023.0.1 | [ALAS2023-2025-1339](https://patchblox.com/security/data/fix/linux/alas2023-2025-1339.md) | Jan 7, 2026 |

---

Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.