CVE-2026-115319

EUVD-2026-108122
fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
2.5 LOW
LOCAL
HIGH
LOW
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 0.84%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
junegunnfzf
0.36.0 ≤
𝑥
≤ 0.74.5
CNA
Debian logo
Debian Releases
Debian Product
Codename
fzf
bookworm
vulnerable
forky
vulnerable
sid
vulnerable
trixie
vulnerable
Common Weakness Enumeration
References
https://github.com/junegunn/fzf
https://github.com/junegunn/fzf/blob/v0.74.5/src/options.go#L1680-L1736
https://github.com/junegunn/fzf/commit/b412a450538e5f4a1d7057732e75d945dafa18a6
https://www.vulncheck.com/advisories/fzf-0.36.0-through-0.74.5-denial-of-service-via-maskactioncontents