# CVE-2024-9427: Koji: escape html tag characters in the query string

> An attacker can inject malicious JavaScript via unsanitized query strings in Koji, potentially bypassing existing XSS protections.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Dec 2024
- **Updated:** 30 Aug 2025
- **Also known as:** GHSA-g2vg-8hfg-79vj, PYSEC-2026-1501, UBUNTU-CVE-2024-9427

## What is CVE-2024-9427?

CVE-2024-9427 is a medium-severity cross-site scripting vulnerability in koji, published on 24 Dec 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in Koji was found. An unsanitized input allows for an XSS attack. Javascript code from a malicious link could be reflected in the resulting web page. It is not expected to be able to submit an action or make a change in Koji due to existing XSS protections in the code

Weakness: CWE-116 (Improper Encoding or Escaping of Output)

## Which versions are affected by CVE-2024-9427?

7 open source packages ship an affected version, including koji.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `koji` | PyPI | All versions | 1.33.2, 1.34.3, 1.35.1 |
| `koji` | PyPI | All versions | 1.33.2 |
| `koji` | PyPI | All versions | 1.33.2 |
| `koji` | PyPI | From 1.34.0 | 1.34.3 |
| `koji` | PyPI | From 1.34.0 | 1.34.3 |
| `koji` | PyPI | From 1.35.0 | 1.35.1 |
| `koji` | PyPI | From 1.35.0 | 1.35.1 |

## How do I fix CVE-2024-9427?

Upgrade koji to a fixed version for your release line: 1.33.2, 1.34.3 or 1.35.1.

## Is CVE-2024-9427 being exploited?

There is no known exploitation of CVE-2024-9427 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-9427 and fix it if it is affected.

What it is: CVE-2024-9427 is a medium-severity cross-site scripting vulnerability in koji, published on 24 Dec 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-9427 in the wild and no public exploit code.

Affected packages and fixed versions:
- koji (PyPI): affected all versions; fixed in 1.33.2, 1.34.3, 1.35.1
- koji (PyPI): affected all versions; fixed in 1.33.2
- koji (PyPI): affected all versions; fixed in 1.33.2
- koji (PyPI): affected from 1.34.0; fixed in 1.34.3
- koji (PyPI): affected from 1.34.0; fixed in 1.34.3
- koji (PyPI): affected from 1.35.0; fixed in 1.35.1
- koji (PyPI): affected from 1.35.0; fixed in 1.35.1

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-2024-9427/ (Markdown: https://insights.sbomify.com/CVE-2024-9427/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-9427
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-9427
- OSV: https://osv.dev/vulnerability/CVE-2024-9427

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-9427/
Summaries are generated and may contain mistakes; the official description above is the record.