Low 2.5Published Oct 22, 2026

CVE-2026-115319fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents

Updated under an hour ago (2026-10-22 15:00 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for junegunn fzf

Exploited in the last 30 days

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.

CVSS: 2.5 LOW (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-407
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Received
Record last updated: Oct 22, 2026
First seen by InfoSec Signals: Oct 22, 2026

Affected products

Affected products

junegunn fzf junegunn:fzf (from the name)	from 0.36.0 through 0.74.5	CNA record

References

https://github.com/junegunn/fzf/commit/b412a450538e5f4a1d7057732e75d945dafa18a6patch
https://github.com/junegunn/fzf/blob/v0.74.5/src/options.go#L1680-L1736technical-description
https://github.com/junegunn/fzfproduct
https://www.vulncheck.com/advisories/fzf-0.36.0-through-0.74.5-denial-of-service-via-maskactioncontentsthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.