# Silentmatt Expr-Eval vulnerabilities

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

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Silentmatt Expr-Eval: 0 in the last 7 days and 0 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-12866, was published on 23 June 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 3 (2 critical, 0 exploited in the wild)

## About Silentmatt Expr-Eval

expr-eval is a mathematical expression evaluator library for JavaScript.

## Latest Silentmatt Expr-Eval vulnerabilities

- [CVE-2026-12866: silentmatt expr-eval code execution in toJSFunction API](https://junglewise.ai/threats/cve-2026-12866-silentmatt-expr-eval-code-execution-in-tojsfunction-api) (critical, CVSS 9.8, published 23 Jun 2026)
- [CVE-2025-13204: expr-eval prototype pollution](https://junglewise.ai/threats/cve-2025-13204-expr-eval-prototype-pollution) (high, CVSS 7.3, published 14 Nov 2025)
- [CVE-2025-12735: expr-eval arbitrary code execution via unvalidated function argument](https://junglewise.ai/threats/cve-2025-12735-expr-eval-arbitrary-code-execution-via-unvalidated-function) (critical, CVSS 9.8, published 5 Nov 2025)

## Most severe Silentmatt Expr-Eval vulnerabilities

- [CVE-2025-12735: expr-eval arbitrary code execution via unvalidated function argument](https://junglewise.ai/threats/cve-2025-12735-expr-eval-arbitrary-code-execution-via-unvalidated-function) (critical, CVSS 9.8, published 5 Nov 2025)
- [CVE-2026-12866: silentmatt expr-eval code execution in toJSFunction API](https://junglewise.ai/threats/cve-2026-12866-silentmatt-expr-eval-code-execution-in-tojsfunction-api) (critical, CVSS 9.8, published 23 Jun 2026)
- [CVE-2025-13204: expr-eval prototype pollution](https://junglewise.ai/threats/cve-2025-13204-expr-eval-prototype-pollution) (high, CVSS 7.3, published 14 Nov 2025)

## 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, "Silentmatt Expr-Eval vulnerabilities", https://junglewise.ai/threats/technologies/expr-eval, 9 November 2026.