# Uglifyjs Project UglifyJS vulnerabilities

Source: https://junglewise.ai/threats/technologies/uglifyjs  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/uglifyjs.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Uglifyjs Project UglifyJS: 0 in the last 7 days and 0 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, UglifyJS improper boolean expression rewriting, was published on 9 October 2018.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 3 (1 critical, 0 exploited in the wild)

## About Uglifyjs Project UglifyJS

JavaScript minifier that reduces code size by removing unnecessary characters.

## Latest Uglifyjs Project UglifyJS vulnerabilities

- [UglifyJS improper boolean expression rewriting](https://junglewise.ai/threats/uglifyjs-improper-boolean-expression-rewriting-34503f03) (info, published 9 Oct 2018)
- [CVE-2015-8858: UglifyJS ReDoS in parse call](https://junglewise.ai/threats/cve-2015-8858-uglifyjs-redos-in-parse-call) (high, CVSS 7.5, published 23 Jan 2017)
- [CVE-2015-8857: UglifyJS incorrect boolean expression rewriting](https://junglewise.ai/threats/cve-2015-8857-uglifyjs-incorrect-boolean-expression-rewriting) (critical, CVSS 9.8, published 23 Jan 2017)

## Most severe Uglifyjs Project UglifyJS vulnerabilities

- [CVE-2015-8857: UglifyJS incorrect boolean expression rewriting](https://junglewise.ai/threats/cve-2015-8857-uglifyjs-incorrect-boolean-expression-rewriting) (critical, CVSS 9.8, published 23 Jan 2017)
- [CVE-2015-8858: UglifyJS ReDoS in parse call](https://junglewise.ai/threats/cve-2015-8858-uglifyjs-redos-in-parse-call) (high, CVSS 7.5, published 23 Jan 2017)
- [UglifyJS improper boolean expression rewriting](https://junglewise.ai/threats/uglifyjs-improper-boolean-expression-rewriting-34503f03) (info, published 9 Oct 2018)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Uglifyjs Project UglifyJS vulnerabilities", https://junglewise.ai/threats/technologies/uglifyjs, 9 November 2026.