# WebAssembly vulnerabilities

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

Junglewise Threat Intelligence has tracked 4 vulnerabilities in WebAssembly: 0 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-90648, was published on 13 September 2026. Nothing was published in the last eight weeks. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 1
- All time: 4 (0 critical, 0 exploited in the wild)

## About WebAssembly

WebAssembly (Wasm) is a binary instruction format for a stack-based virtual machine designed as a portable compilation target for programming languages.

## Latest WebAssembly vulnerabilities

- [CVE-2026-90648: WebAssembly wabt wasm2c sandbox escape via table fli](https://junglewise.ai/threats/cve-2026-90648-webassembly-wabt-wasm2c-sandbox-escape-via-table-fli) (info, CVSS 7.5, published 13 Sep 2026)
- [CVE-2026-8257: WebAssembly Binaryen reachable assertion in BrOn Parser](https://junglewise.ai/threats/cve-2026-8257-webassembly-binaryen-reachable-assertion-in-bron-parser) (low, CVSS 3.3, published 11 May 2026)
- [CVE-2025-15412: A security vulnerability has been detected in WebAssembly wabt up to 1.0.39. This issue affects the function…](https://junglewise.ai/threats/cve-2025-15412-a-security-vulnerability-has-been-detected-in-webassembly-wabt-up) (medium, CVSS 5.3, published 1 Jan 2026)
- [CVE-2025-15411: A weakness has been identified in WebAssembly wabt up to 1.0.39. This vulnerability affects the function…](https://junglewise.ai/threats/cve-2025-15411-a-weakness-has-been-identified-in-webassembly-wabt-up-to-1-0-39) (medium, CVSS 5.3, published 1 Jan 2026)

## Most severe WebAssembly vulnerabilities

- [CVE-2025-15412: A security vulnerability has been detected in WebAssembly wabt up to 1.0.39. This issue affects the function…](https://junglewise.ai/threats/cve-2025-15412-a-security-vulnerability-has-been-detected-in-webassembly-wabt-up) (medium, CVSS 5.3, published 1 Jan 2026)
- [CVE-2025-15411: A weakness has been identified in WebAssembly wabt up to 1.0.39. This vulnerability affects the function…](https://junglewise.ai/threats/cve-2025-15411-a-weakness-has-been-identified-in-webassembly-wabt-up-to-1-0-39) (medium, CVSS 5.3, published 1 Jan 2026)
- [CVE-2026-8257: WebAssembly Binaryen reachable assertion in BrOn Parser](https://junglewise.ai/threats/cve-2026-8257-webassembly-binaryen-reachable-assertion-in-bron-parser) (low, CVSS 3.3, published 11 May 2026)
- [CVE-2026-90648: WebAssembly wabt wasm2c sandbox escape via table fli](https://junglewise.ai/threats/cve-2026-90648-webassembly-wabt-wasm2c-sandbox-escape-via-table-fli) (info, CVSS 7.5, published 13 Sep 2026)

## 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 | 1 | 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 |

## WebAssembly technologies

- [WebAssembly Wabt](https://junglewise.ai/threats/technologies/wabt): 3 vulnerabilities

## 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, "WebAssembly vulnerabilities", https://junglewise.ai/threats/vendors/webassembly, 9 November 2026.