# CVE-2024-21489: uPlot Prototype Pollution vulnerability

> Prototype pollution in uPlot allows attackers to manipulate object prototypes, potentially leading to code execution or security bypasses.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 Oct 2024
- **Updated:** 16 Aug 2026
- **Also known as:** GHSA-34q8-jcq6-mc37, RHSA-2024:8083

## What is CVE-2024-21489?

CVE-2024-21489 is a high-severity vulnerability in org.webjars.npm:uplot, published on 1 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Versions of the package uplot before 1.6.31 are vulnerable to Prototype Pollution via the uplot.assign function due to missing check if the attribute resolves to the object prototype.

Weakness: CWE-1321 (Improperly Controlled Modification of Object Prototype Attributes)

## Which versions are affected by CVE-2024-21489?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `uplot` | npm | All versions | 1.6.31 |
| `uplot` | npm | All versions | 1.6.31 |
| `grafana` | Red Hat:rhel_aus:8.4::appstream | All versions | 0:7.3.6-7.el8_4 |
| `grafana-debuginfo` | Red Hat:rhel_aus:8.4::appstream | All versions | 0:7.3.6-7.el8_4 |
| `grafana` | Red Hat:rhel_e4s:8.4::appstream | All versions | 0:7.3.6-7.el8_4 |
| `grafana-debuginfo` | Red Hat:rhel_e4s:8.4::appstream | All versions | 0:7.3.6-7.el8_4 |
| `grafana` | Red Hat:rhel_tus:8.4::appstream | All versions | 0:7.3.6-7.el8_4 |
| `grafana-debuginfo` | Red Hat:rhel_tus:8.4::appstream | All versions | 0:7.3.6-7.el8_4 |

## How do I fix CVE-2024-21489?

Upgrade uplot to 1.6.31 or later.

## Is CVE-2024-21489 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-21489 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-21489 and fix it if it is affected.

What it is: CVE-2024-21489 is a high-severity vulnerability in org.webjars.npm:uplot, published on 1 Oct 2024. 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-2024-21489 exists.

Affected packages and fixed versions:
- uplot (npm): affected all versions; fixed in 1.6.31
- uplot (npm): affected all versions; fixed in 1.6.31

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-2024-21489/ (Markdown: https://insights.sbomify.com/CVE-2024-21489/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-21489
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-21489
- OSV: https://osv.dev/vulnerability/CVE-2024-21489

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-21489/
Summaries are generated and may contain mistakes; the official description above is the record.