High severity · published Jun 10, 2026
CVE-2026-44693
Pi-hole FTL: Unauthenticated Session Hijacking via Race Condition on Global Session Buffer
8.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FT
FTL · pi-hole
< 6.6.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44693
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44693
github.com
https://github.com/pi-hole/FTL/releases/tag/v6.6.1
github.com
https://github.com/pi-hole/FTL/security/advisories/GHSA-9ff5-f3v5-2xc7
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