# CVE-2024-9506: Regular Expression Denial of Service (ReDoS)

> Attackers can cause a denial of service in applications using Vue by exploiting a vulnerable regular expression in the parseHTML function.

- **Severity:** Low 3.7 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Oct 2024
- **Updated:** 15 Oct 2024
- **Also known as:** CLSA-2026-1791908879, CLSA-2026-1793148266, CLSA-2026-1793148267, GHSA-5j4c-8p2g-v4jx

## What is CVE-2024-9506?

CVE-2024-9506 is a low-severity denial of service vulnerability in vue, published on 15 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Improper regular expression in Vue's parseHTML function leads to a potential regular expression denial of service vulnerability.

Weakness: CWE-1333 (Inefficient Regular Expression Complexity)

## Which versions are affected by CVE-2024-9506?

2 open source packages ship an affected version, including vue.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `vue` | npm | From 2.0.0-alpha.1 | 3.0.0-alpha.0 |
| `vue` | npm | From 2.0.0-alpha.1 | 3.0.0-alpha.0 |

## How do I fix CVE-2024-9506?

Upgrade vue to 3.0.0-alpha.0 or later.

## Is CVE-2024-9506 being exploited?

There is no known exploitation of CVE-2024-9506 in the wild and no public exploit code.

Public exploit code:

- Patched Vue 2.7.16 template compiler with fixes for CVE‑2024‑6783 and CVE-2024-9506 (github_poc): https://github.com/bio/vue-template-compiler-patched

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-9506 and fix it if it is affected.

What it is: CVE-2024-9506 is a low-severity denial of service vulnerability in vue, published on 15 Oct 2024. 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-2024-9506 in the wild and no public exploit code.

Affected packages and fixed versions:
- vue (npm): affected from 2.0.0-alpha.1; fixed in 3.0.0-alpha.0
- vue (npm): affected from 2.0.0-alpha.1; fixed in 3.0.0-alpha.0

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-2024-9506/ (Markdown: https://insights.sbomify.com/CVE-2024-9506/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-9506
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-9506
- OSV: https://osv.dev/vulnerability/CVE-2024-9506

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-9506/
Summaries are generated and may contain mistakes; the official description above is the record.