# CVE-2020-28500: libjs-lodash: Lodash versions prior to 4.17.21 are vulnerable to Regular Expression Denial of Service (ReDoS) via the toNumber, tri...

CVE-2020-28500 is fixed in 3 products on 1 platform, first by libjs-lodash 4.17.4+dfsg-1ubuntu0.1~esm1, released March 31, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-28500
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0734
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 15, 2021

## Description

Lodash versions prior to 4.17.21 are vulnerable to Regular Expression Denial of Service (ReDoS) via the toNumber, trim and trimEnd functions.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libjs-lodash Ubuntu 18.04.6 LTS (bionic) | 4.17.4+dfsg-1ubuntu0.1~esm1 | [libjs-lodash 4.17.4+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libjs-lodash-4.17.4-dfsg-1ubuntu0.1-esm1.md) | Mar 31, 2026 |
| Linux | libjs-lodash Ubuntu 20.04 LTS (focal) | 4.17.15+dfsg-2ubuntu0.1~esm1 | [libjs-lodash 4.17.15+dfsg-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libjs-lodash-4.17.15-dfsg-2ubuntu0.1-esm1.md) | Mar 31, 2026 |
| Linux | node-lodash Ubuntu 18.04.6 LTS (bionic) | 4.17.4+dfsg-1ubuntu0.1~esm1 | [node-lodash 4.17.4+dfsg-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-node-lodash-4.17.4-dfsg-1ubuntu0.1-esm1.md) | Mar 31, 2026 |
| Linux | node-lodash Ubuntu 20.04 LTS (focal) | 4.17.15+dfsg-2ubuntu0.1~esm1 | [node-lodash 4.17.15+dfsg-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-node-lodash-4.17.15-dfsg-2ubuntu0.1-esm1.md) | Mar 31, 2026 |
| Linux | node-lodash-packages Ubuntu 20.04 LTS (focal) | 4.17.15+dfsg-2ubuntu0.1~esm1 | [node-lodash-packages 4.17.15+dfsg-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-node-lodash-packages-4.17.15-dfsg-2ubuntu0.1-esm1.md) | Mar 31, 2026 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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