CVE-2026-115319
fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContents
- State
- Published
- Severity
- 2.0 Low
- Published
- Oct 22, 2026
- Updated
- Oct 29, 2026
- Reserved
- Oct 22, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.0 Low | 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 | VulnCheck |
| 3.1 | 2.5 Low | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L | VulnCheck |
Weaknesses
- CWE-407 Inefficient Algorithmic Complexity
Affected Products
| Product | Versions |
|---|---|
fzfjunegunn |
|
References
- Patch Commitpatch
- https://github.com/junegunn/fzf/blob/v0.74.5/src/options.go#L1680-L1736technical-description
- https://github.com/junegunn/fzfproduct
- VulnCheck Advisory: fzf 0.36.0 through 0.74.5 Denial of Service via maskActionContentsthird-party-advisory
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