# wasmtime (PyPI) vulnerabilities

Source: https://junglewise.ai/threats/technologies/pypi-wasmtime  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/pypi-wasmtime.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in wasmtime (PyPI): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-34983, was published on 9 April 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 5 (0 critical, 0 exploited in the wild)

## About wasmtime (PyPI)

Runtime for executing WebAssembly modules with an embedded interpreter.

## Latest wasmtime (PyPI) vulnerabilities

- [CVE-2026-34983: Bytecode Alliance Wasmtime use-after-free in Linker cloning](https://junglewise.ai/threats/cve-2026-34983-bytecode-alliance-wasmtime-use-after-free-in-linker-cloning) (medium, CVSS 5, published 9 Apr 2026)
- [CVE-2024-47813: Bytecode Alliance Wasmtime race condition in internal type registry](https://junglewise.ai/threats/cve-2024-47813-bytecode-alliance-wasmtime-race-condition-in-internal-type) (low, CVSS 3.1, published 9 Oct 2024)
- [CVE-2024-30266: RUSTSEC-2024-0441 - Panic when using a dropped extenref-typed element segment](https://junglewise.ai/threats/cve-2024-30266-pysec-2024-327-wasmtime-is-a-runtime-for-webassembly-the-19-0-0) (low, CVSS 3.1, published 2 Apr 2024)
- [CVE-2021-39216: RUSTSEC-2021-0110 - Multiple Vulnerabilities in Wasmtime](https://junglewise.ai/threats/cve-2021-39216-out-of-bounds-read-write-and-invalid-free-with-externref-s-and-gc) (low, CVSS 3.1, published 17 Sep 2021)
- [CVE-2021-32629: RUSTSEC-2021-0067 - Memory access due to code generation flaw in Cranelift module](https://junglewise.ai/threats/cve-2021-32629-memory-access-due-to-code-generation-flaw-in-cranelift-module) (low, CVSS 3.1, published 21 May 2021)

## Most severe wasmtime (PyPI) vulnerabilities

- [CVE-2026-34983: Bytecode Alliance Wasmtime use-after-free in Linker cloning](https://junglewise.ai/threats/cve-2026-34983-bytecode-alliance-wasmtime-use-after-free-in-linker-cloning) (medium, CVSS 5, published 9 Apr 2026)
- [CVE-2021-32629: RUSTSEC-2021-0067 - Memory access due to code generation flaw in Cranelift module](https://junglewise.ai/threats/cve-2021-32629-memory-access-due-to-code-generation-flaw-in-cranelift-module) (low, CVSS 3.1, published 21 May 2021)
- [CVE-2024-30266: RUSTSEC-2024-0441 - Panic when using a dropped extenref-typed element segment](https://junglewise.ai/threats/cve-2024-30266-pysec-2024-327-wasmtime-is-a-runtime-for-webassembly-the-19-0-0) (low, CVSS 3.1, published 2 Apr 2024)
- [CVE-2021-39216: RUSTSEC-2021-0110 - Multiple Vulnerabilities in Wasmtime](https://junglewise.ai/threats/cve-2021-39216-out-of-bounds-read-write-and-invalid-free-with-externref-s-and-gc) (low, CVSS 3.1, published 17 Sep 2021)
- [CVE-2024-47813: Bytecode Alliance Wasmtime race condition in internal type registry](https://junglewise.ai/threats/cve-2024-47813-bytecode-alliance-wasmtime-race-condition-in-internal-type) (low, CVSS 3.1, published 9 Oct 2024)

## 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 |

## Other PyPI technologies

- [tensorflow (PyPI)](https://junglewise.ai/threats/technologies/pypi-tensorflow): 435 vulnerabilities
- [tensorflow-cpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-cpu): 430 vulnerabilities
- [tensorflow-gpu (PyPI)](https://junglewise.ai/threats/technologies/tensorflow-gpu): 427 vulnerabilities
- [open-webui (PyPI)](https://junglewise.ai/threats/technologies/open-webui): 177 vulnerabilities
- [Django (PyPI)](https://junglewise.ai/threats/technologies/django): 173 vulnerabilities
- [apache-airflow (PyPI)](https://junglewise.ai/threats/technologies/apache-airflow): 159 vulnerabilities
- [pillow (PyPI)](https://junglewise.ai/threats/technologies/pillow): 125 vulnerabilities
- [praisonai (PyPI)](https://junglewise.ai/threats/technologies/pypi-praisonai): 120 vulnerabilities
- [vllm (PyPI)](https://junglewise.ai/threats/technologies/pypi-vllm): 117 vulnerabilities
- [plone (PyPI)](https://junglewise.ai/threats/technologies/pypi-plone): 101 vulnerabilities
- [mlflow (PyPI)](https://junglewise.ai/threats/technologies/mlflow): 88 vulnerabilities
- [picklescan (PyPI)](https://junglewise.ai/threats/technologies/picklescan): 86 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, "wasmtime (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/pypi-wasmtime, 13 November 2026.