CVE-2026-115319

low

Description

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.

References

https://www.vulncheck.com/advisories/fzf-0.36.0-through-0.74.5-denial-of-service-via-maskactioncontents

https://github.com/junegunn/fzf/commit/b412a450538e5f4a1d7057732e75d945dafa18a6

https://github.com/junegunn/fzf/blob/v0.74.5/src/options.go#L1680-L1736

https://github.com/junegunn/fzf

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-108122

Details

Source: Mitre, NVD

Published: 2026-10-22

Updated: 2026-10-22

Risk Information

CVSS v2

Base Score: 1

Vector: CVSS2#AV:L/AC:H/Au:S/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 2.5

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Severity: Low

CVSS v4

Base Score: 2

Vector: 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

Severity: Low

EPSS

EPSS: 0.00101