# CVE-2024-34342: react-pdf's PDF.js vulnerable to arbitrary JavaScript execution upon opening a malicious PDF

> Attackers can execute arbitrary JavaScript in the hosting domain by tricking users into opening malicious PDFs with react-pdf.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 7 May 2024
- **Updated:** 2 Aug 2024
- **Also known as:** CLSA-2026-1775781167, GHSA-87hq-q4gp-9wr4, ROOT-APP-NPM-CVE-2024-34342

## What is CVE-2024-34342?

CVE-2024-34342 is a high-severity cross-site scripting vulnerability in wojtekmaj react-pdf, published on 7 May 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

react-pdf displays PDFs in React apps. If PDF.js is used to load a malicious PDF, and PDF.js is configured with `isEvalSupported` set to `true` (which is the default value), unrestricted attacker-controlled JavaScript will be executed in the context of the hosting domain. This vulnerability is fixed in 7.7.3 and 8.0.2.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2024-34342?

4 open source packages ship an affected version, including react-pdf.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `react-pdf` | npm | All versions | 7.7.3 |
| `react-pdf` | npm | All versions | 7.7.3 |
| `react-pdf` | npm | From 8.0.0 | 8.0.2 |
| `react-pdf` | npm | From 8.0.0 | 8.0.2 |

## How do I fix CVE-2024-34342?

Upgrade react-pdf to a fixed version for your release line: 7.7.3 or 8.0.2.

## Is CVE-2024-34342 being exploited?

There is no known exploitation of CVE-2024-34342 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-34342 and fix it if it is affected.

What it is: CVE-2024-34342 is a high-severity cross-site scripting vulnerability in wojtekmaj react-pdf, published on 7 May 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-34342 in the wild and no public exploit code.

Affected packages and fixed versions:
- react-pdf (npm): affected all versions; fixed in 7.7.3
- react-pdf (npm): affected all versions; fixed in 7.7.3
- react-pdf (npm): affected from 8.0.0; fixed in 8.0.2
- react-pdf (npm): affected from 8.0.0; fixed in 8.0.2

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-2024-34342/ (Markdown: https://insights.sbomify.com/CVE-2024-34342/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-34342
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-34342
- OSV: https://osv.dev/vulnerability/CVE-2024-34342

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-34342/
Summaries are generated and may contain mistakes; the official description above is the record.