# CVE-2023-36095: langchain Code Injection vulnerability

> Attackers can execute arbitrary code via unsafe Python exec calls in LangChain's PALChain functions, requiring library upgrades.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 5 Aug 2023
- **Updated:** 9 Jul 2026
- **Also known as:** GHSA-gwqq-6vq7-5j86, PYSEC-2023-138

## What is CVE-2023-36095?

CVE-2023-36095 is a critical code injection vulnerability in n/a, published on 5 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue in Harrison Chase langchain v.0.0.194 allows an attacker to execute arbitrary code via the python exec calls in the PALChain, affected functions include from_math_prompt and from_colored_object_prompt.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2023-36095?

3 open source packages ship an affected version, including langchain. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `langchain` | PyPI | All versions | 0.0.236 |
| `langchain` | PyPI | All versions | 0.0.236 |
| `langchain` | PyPI | All versions | 0.0.236 |

Products: Langchain Langchain.

## How do I fix CVE-2023-36095?

Upgrade langchain to 0.0.236 or later.

## Is CVE-2023-36095 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36095 exists.

## Other vulnerabilities in n/a

- [CVE-2023-39631](https://insights.sbomify.com/CVE-2023-39631/): Langchain vulnerable to arbitrary code execution via the evaluate function in the numexpr library (critical 9.8)
- [CVE-2023-36281](https://insights.sbomify.com/CVE-2023-36281/): langchain vulnerable to arbitrary code execution (critical 9.8)
- [CVE-2023-38860](https://insights.sbomify.com/CVE-2023-38860/): LangChain vulnerable to arbitrary code execution (critical 9.8)
- [CVE-2023-38896](https://insights.sbomify.com/CVE-2023-38896/): LangChain vulnerable to arbitrary code execution (critical 9.8)
- [CVE-2023-39659](https://insights.sbomify.com/CVE-2023-39659/): LangChain vulnerable to arbitrary code execution (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-36095 and fix it if it is affected.

What it is: CVE-2023-36095 is a critical code injection vulnerability in n/a, published on 5 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36095 exists.

Affected packages and fixed versions:
- langchain (PyPI): affected all versions; fixed in 0.0.236
- langchain (PyPI): affected all versions; fixed in 0.0.236
- langchain (PyPI): affected all versions; fixed in 0.0.236

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-2023-36095/ (Markdown: https://insights.sbomify.com/CVE-2023-36095/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-36095
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-36095
- OSV: https://osv.dev/vulnerability/CVE-2023-36095

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-36095/
Summaries are generated and may contain mistakes; the official description above is the record.