# CVE-2026-100867: spaceship-prompt through 4.22.5 Terminal Escape Sequence Injection

> Attackers can inject terminal escape sequences via project manifest fields to spoof displayed text or manipulate window titles in the spaceship-prompt zsh theme.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/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:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 27 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** GHSA-wm7h-qp5m-qqh7

## What is CVE-2026-100867?

CVE-2026-100867 is a medium-severity vulnerability in spaceship-prompt, published on 27 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

spaceship-prompt through 4.22.5 fails to sanitize control characters from project manifest version fields before rendering them in the zsh prompt. Attackers can embed ANSI/OSC escape sequences in version fields of package manifests to manipulate terminal output, rewrite window titles, or spoof displayed text when victims enter the directory.

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

## Which versions are affected by CVE-2026-100867?


## How do I fix CVE-2026-100867?

No fix has been published for CVE-2026-100867 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-100867 being exploited?

There is no known exploitation of CVE-2026-100867 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100867 and fix it if it is affected.

What it is: CVE-2026-100867 is a medium-severity vulnerability in spaceship-prompt, published on 27 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-100867 in the wild and no public exploit code.

Affected product: spaceship-prompt. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-100867/ (Markdown: https://insights.sbomify.com/CVE-2026-100867/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100867
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100867
- OSV: https://osv.dev/vulnerability/CVE-2026-100867

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-100867/
Summaries are generated and may contain mistakes; the official description above is the record.