CVE-2026-115319 Details
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.
A denial-of-service vulnerability has been identified in fzf versions 0.36.0 through 0.74.5. The issue arises from an inefficient algorithmic complexity in the 'maskActionContents' function, where quadratic string concatenation can be exploited by local attackers. This vulnerability allows attackers to exhaust the '--listen' HTTP server by sending repeated POST bodies of approximately 1 MB each to the unauthenticated localhost port. The single-threaded server becomes blocked for about 30 seconds with each request.
Users can upgrade to fzf version 0.74.6 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 22, 2026CISA-ADP
Assessed Oct 29, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-407 | Inefficient Algorithmic Complexity | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| fzf | >= 0.36.0, <= 0.74.5 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 29, 2026 | CVE Modified | CISA-ADP |
| Oct 22, 2026 | New CVE Received | [email protected] |