fzf vulnerable to denial of service through quadratic HTTP request-body accumulation
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.
GHSA-mvmf-94v6-879g
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:GHSA-mvmf-94v6-879g
github.com/junegunn/fzf
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 0.73.1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.73.1"
}
]
}
],
"package": {
"name": "github.com/junegunn/fzf",
"purl": "pkg:golang/github.com/junegunn/fzf",
"ecosystem": "Go"
},
"database_specific": {
"source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-mvmf-94v6-879g/GHSA-mvmf-94v6-879g.json"
}
}
]- Related CVEs
- CVE-2026-53433
Source reference:
/aliases
Publisher severity
No explicit severity was provided.
- Event
- #63985 · Revision 1
- Added to Heist Feed
- Publisher date