# CVE-2019-1010169: Denial of service in Jsi

> An out-of-bounds read in the Jsish JavaScript engine allows attackers to cause a denial of service by executing crafted JavaScript code.

- **Severity:** High 7.5 (`CVSS:3.0/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:** 23 Jul 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-3fh7-p98p-pg63

## What is CVE-2019-1010169?

CVE-2019-1010169 is a high-severity denial of service vulnerability in Jsish Jsish, published on 23 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Jsish 2.4.77 2.0477 is affected by: Out-of-bounds Read. The impact is: denial of service. The component is: function lexer_getchar (jsiLexer.c:9). The attack vector is: executing crafted javascript code. The fixed version is: 2.4.78.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2019-1010169?

It affects 1 product.


Products: Jsish Jsish.

## How do I fix CVE-2019-1010169?

No fix has been published for CVE-2019-1010169 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-1010169 being exploited?

There is no known exploitation of CVE-2019-1010169 in the wild and no public exploit code.

## Other vulnerabilities in Jsish Jsish

- [CVE-2025-65570](https://insights.sbomify.com/CVE-2025-65570/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-24186](https://insights.sbomify.com/CVE-2024-24186/): Denial of service in n/a (critical 9.8)
- [CVE-2024-24188](https://insights.sbomify.com/CVE-2024-24188/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-24189](https://insights.sbomify.com/CVE-2024-24189/): Use after free in n/a (critical 9.8)
- [CVE-2020-22873](https://insights.sbomify.com/CVE-2020-22873/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1010169 and fix it if it is affected.

What it is: CVE-2019-1010169 is a high-severity denial of service vulnerability in Jsish Jsish, published on 23 Jul 2019. 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-2019-1010169 in the wild and no public exploit code.

Affected product: Jsish Jsish. 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-2019-1010169/ (Markdown: https://insights.sbomify.com/CVE-2019-1010169/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1010169
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1010169
- OSV: https://osv.dev/vulnerability/CVE-2019-1010169

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1010169/
Summaries are generated and may contain mistakes; the official description above is the record.