CVE-2026-115319CWE-407

CVE-2026-115319

Low · published October 22, 2026

CVSS v3.1
2.5
EPSS
0%
Percentile
0.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
2.5 · LOW
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
2.0 · CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00101 · 0.8th percentile
Weakness
CWE-407 · Inefficient Algorithmic Complexity
Published
2026-10-22T15:17Z
References (4)
https://github.com/junegunn/fzf · [email protected]https://github.com/junegunn/fzf/blob/v0.74.5/src/options.go#L1680-L1736 · [email protected]https://github.com/junegunn/fzf/commit/b412a450538e5f4a1d7057732e75d945dafa18a6 · [email protected]https://www.vulncheck.com/advisories/fzf-0.36.0-through-0.74.5-denial-of-service-via-maskactioncontents · [email protected]
EPSS history
Timeline
  • 24 OCT 03:52Z
    EPSS moved — → 0%
    epss
  • 22 OCT 10:57Z
    fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents
    cvelistv5
  • 22 OCT 10:57Z
    fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents
    cvelistv5