# CVE-2026-82584: Terminal escape sequence injection in the mix igniter.install confirmation prompt via package metadata

> Attackers can forge terminal confirmation prompts via escape sequences in package metadata, deceiving developers into installing malicious dependencies.

- **Severity:** Low 2.3 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **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 Sep 2026
- **Updated:** 8 Sep 2026
- **Also known as:** EEF-CVE-2026-82584, GHSA-cj7w-j579-gc42

## What is CVE-2026-82584?

CVE-2026-82584 is a low-severity vulnerability in ash-project igniter, published on 7 Sep 2026. 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

Improper Neutralization of Escape, Meta, or Control Sequences vulnerability in ash-project igniter allows a malicious package publisher to forge the mix igniter.install confirmation prompt.

mix igniter.install prints a confirmation panel (an anti-typosquatting safeguard) listing a package's hex metadata before adding it. The panel builder in Igniter.Project.Deps wrote publisher-controlled fields (meta.description, owner usernames, requirement names, version) to the terminal with only newlines stripped. A malicious or typosquatted package can embed ANSI terminal escape sequences (cursor movement, line erase, carriage returns) in its metadata to overwrite the panel, forging trusted author names and download counts while concealing the real ones, so a developer relying on the panel to vet the package is deceived into approving a malicious dependency.

This issue affects igniter: from 0.8.1 before 0.8.4.

Weakness: CWE-150 (Improper Neutralization of Escape, Meta, or Control Sequences)

## Which versions are affected by CVE-2026-82584?

1 open source package ship an affected version, including igniter.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `igniter` | Hex | From 0.8.1 | 0.8.4 |

## How do I fix CVE-2026-82584?

Upgrade igniter to 0.8.4 or later.

## Is CVE-2026-82584 being exploited?

There is no known exploitation of CVE-2026-82584 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-82584 and fix it if it is affected.

What it is: CVE-2026-82584 is a low-severity vulnerability in ash-project igniter, published on 7 Sep 2026. 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-2026-82584 in the wild and no public exploit code.

Affected packages and fixed versions:
- igniter (Hex): affected from 0.8.1; fixed in 0.8.4

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-2026-82584/ (Markdown: https://insights.sbomify.com/CVE-2026-82584/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-82584
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-82584
- OSV: https://osv.dev/vulnerability/CVE-2026-82584

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-82584/
Summaries are generated and may contain mistakes; the official description above is the record.