# CVE-2022-27810: Denial of service in Hermes

> Attackers can cause a denial of service via infinite recursion in the Hermes JavaScript engine when running in development mode.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Oct 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-jpvx-hr4h-p665

## What is CVE-2022-27810?

CVE-2022-27810 is a high-severity denial of service vulnerability in Facebook Hermes, published on 6 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

It was possible to trigger an infinite recursion condition in the error handler when Hermes executed specific maliciously formed JavaScript. This condition was only possible to trigger in dev-mode (when asserts were enabled). This issue affects Hermes versions prior to v0.12.0.

Weakness: CWE-674 (Uncontrolled Recursion)

## Which versions are affected by CVE-2022-27810?

It affects 1 product.


Products: Facebook Hermes.

## How do I fix CVE-2022-27810?

No fix has been published for CVE-2022-27810 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-27810 being exploited?

There is no known exploitation of CVE-2022-27810 in the wild and no public exploit code.

## Other vulnerabilities in Facebook Hermes

- [CVE-2023-23556](https://insights.sbomify.com/CVE-2023-23556/): Memory corruption in Hermes (critical 9.8)
- [CVE-2023-23557](https://insights.sbomify.com/CVE-2023-23557/): Memory corruption in Hermes (critical 9.8)
- [CVE-2023-25933](https://insights.sbomify.com/CVE-2023-25933/): Memory corruption in Hermes (critical 9.8)
- [CVE-2023-28081](https://insights.sbomify.com/CVE-2023-28081/): Use after free in Hermes (critical 9.8)
- [CVE-2023-30470](https://insights.sbomify.com/CVE-2023-30470/): Use after free in Hermes (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-27810 and fix it if it is affected.

What it is: CVE-2022-27810 is a high-severity denial of service vulnerability in Facebook Hermes, published on 6 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-27810 in the wild and no public exploit code.

Affected product: Facebook Hermes. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-27810/ (Markdown: https://insights.sbomify.com/CVE-2022-27810/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-27810
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-27810
- OSV: https://osv.dev/vulnerability/CVE-2022-27810

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-27810/
Summaries are generated and may contain mistakes; the official description above is the record.