CVE-2026-53433
Denial of Service in fzf
Description
fzf is vulnerable to a Denial of Service (DoS) due to inefficient HTTP body processing in the --listen mode due to inefficient HTTP body processing using repeated string concatenation, resulting in quadratic time complexity (O(n²)). A crafted POST request with many small segments can trigger excessive CPU usage during request handling.This allows a single malicious request to monopolize the single‑threaded HTTP server, blocking all other clients and resulting in denial of service. This issue was fixed in version 0.73.1.
INFO
Published Date :
June 30, 2026, 12:01 p.m.
Last Modified :
June 30, 2026, 12:01 p.m.
Remotely Exploit :
No
Source :
CERT-PL
Affected Products
The following products are affected by CVE-2026-53433
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | 4bb8329e-dd38-46c1-aafb-9bf32bcb93c6 |
Solution
- Update fzf to version 0.73.1 or later.
- Avoid using --listen mode with untrusted input.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53433 vulnerability anywhere in the article.
-
cert.pl
Vulnerabilities in fzf software
Vulnerabilities in fzf software CVE ID CVE-2026-53432 Publication date 30 June 2026 Vendor fzf Product fzf Vulnerable versions All before 0.73.1 Vulnerability type (CWE) Integer Overflow or Wraparound ... Read more