# Meta Hermes vulnerabilities

Source: https://junglewise.ai/threats/technologies/hermes  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/hermes.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Meta Hermes: 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-2021-24037, was published on 24 May 2022.

## Counts

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

## About Meta Hermes

JavaScript engine that optimizes performance by compiling source code to bytecode.

## Latest Meta Hermes vulnerabilities

- [CVE-2021-24037: Meta Hermes JavaScript engine use after free](https://junglewise.ai/threats/cve-2021-24037-meta-hermes-javascript-engine-use-after-free) (low, CVSS 3.1, published 24 May 2022)
- [CVE-2020-1915: Meta Hermes out-of-bounds read in JavaScript interpreter](https://junglewise.ai/threats/cve-2020-1915-meta-hermes-out-of-bounds-read-in-javascript-interpreter) (low, CVSS 3.1, published 24 May 2022)
- [CVE-2020-1914: Facebook Hermes out-of-bounds read in SaveGeneratorLong](https://junglewise.ai/threats/cve-2020-1914-facebook-hermes-out-of-bounds-read-in-savegeneratorlong) (low, CVSS 3.1, published 24 May 2022)
- [CVE-2020-1913: Facebook Hermes signed to unsigned conversion error](https://junglewise.ai/threats/cve-2020-1913-facebook-hermes-signed-to-unsigned-conversion-error) (low, CVSS 3.1, published 24 May 2022)

## Most severe Meta Hermes vulnerabilities

- [CVE-2021-24037: Meta Hermes JavaScript engine use after free](https://junglewise.ai/threats/cve-2021-24037-meta-hermes-javascript-engine-use-after-free) (low, CVSS 3.1, published 24 May 2022)
- [CVE-2020-1915: Meta Hermes out-of-bounds read in JavaScript interpreter](https://junglewise.ai/threats/cve-2020-1915-meta-hermes-out-of-bounds-read-in-javascript-interpreter) (low, CVSS 3.1, published 24 May 2022)
- [CVE-2020-1913: Facebook Hermes signed to unsigned conversion error](https://junglewise.ai/threats/cve-2020-1913-facebook-hermes-signed-to-unsigned-conversion-error) (low, CVSS 3.1, published 24 May 2022)
- [CVE-2020-1914: Facebook Hermes out-of-bounds read in SaveGeneratorLong](https://junglewise.ai/threats/cve-2020-1914-facebook-hermes-out-of-bounds-read-in-savegeneratorlong) (low, CVSS 3.1, published 24 May 2022)

## 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 Meta technologies

- [Meta React Server Components (Parcel)](https://junglewise.ai/threats/technologies/react-server-components-parcel): 11 vulnerabilities
- [Meta React Server Components (Turbopack)](https://junglewise.ai/threats/technologies/react-server-components-turbopack): 11 vulnerabilities
- [Meta React Server Components (Webpack)](https://junglewise.ai/threats/technologies/react-server-components-webpack): 11 vulnerabilities
- [Meta Proxygen](https://junglewise.ai/threats/technologies/meta-proxygen): 6 vulnerabilities
- [Meta WhatsApp for iOS](https://junglewise.ai/threats/technologies/whatsapp-for-ios): 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, "Meta Hermes vulnerabilities", https://junglewise.ai/threats/technologies/hermes, 12 November 2026.