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

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-10 · updated 2026-07-23
Weakness: CWE-362

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.

Affected products

pi-hole FTL: before 6.6.1

References

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

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