DEBIAN-CVE-2026-53433
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.
DEBIAN-CVE-2026-53433
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:DEBIAN-CVE-2026-53433
fzf
Source reference: /affected/0/package/name
- Affected versions
- 0.38.0-1
Source reference:
/affected/0/versions0.42.0-1Source reference:
/affected/0/versions0.44.1-1Source reference:
/affected/0/versions0.46.1-1Source reference:
/affected/0/versions0.55.0-1Source reference:
/affected/0/versions0.56.3-1Source reference:
/affected/0/versions0.57.0-1Source reference:
/affected/0/versions0.58.0-1Source reference:
/affected/0/versions0.60.0-1Source reference:
/affected/0/versions0.60.1-1Source reference:
/affected/0/versions0.60.2-1Source reference:
/affected/0/versions0.60.3-1Source reference:
/affected/0/versions0.64.0-1Source reference:
/affected/0/versions0.65.1-1Source reference:
/affected/0/versions0.66.0-1Source reference:
/affected/0/versions0.67.0-1Source reference:
/affected/0/versions0.70.0-1Source reference:
/affected/0/versions0.72.0-1Source reference:
/affected/0/versions0.73.1-1Source reference:
/affected/0/versions0.74.1-1Source reference:
/affected/0/versions0.74.3-1Source reference:
/affected/0/versions0.74.4-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
fzf
Source reference: /affected/1/package/name
- Affected versions
- 0.60.3-1
Source reference:
/affected/1/versions0.64.0-1Source reference:
/affected/1/versions0.65.1-1Source reference:
/affected/1/versions0.66.0-1Source reference:
/affected/1/versions0.67.0-1Source reference:
/affected/1/versions0.70.0-1Source reference:
/affected/1/versions0.72.0-1Source reference:
/affected/1/versions0.73.1-1Source reference:
/affected/1/versions0.74.1-1Source reference:
/affected/1/versions0.74.3-1Source reference:
/affected/1/versions0.74.4-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
fzf
Source reference: /affected/2/package/name
- Affected versions
- 0.60.3-1
Source reference:
/affected/2/versions0.64.0-1Source reference:
/affected/2/versions0.65.1-1Source reference:
/affected/2/versions0.66.0-1Source reference:
/affected/2/versions0.67.0-1Source reference:
/affected/2/versions0.70.0-1Source reference:
/affected/2/versions0.72.0-1Source reference:
/affected/2/versions - Fixed versions
- 0.73.1-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "fzf",
"purl": "pkg:deb/debian/fzf?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.38.0-1",
"0.42.0-1",
"0.44.1-1",
"0.46.1-1",
"0.55.0-1",
"0.56.3-1",
"0.57.0-1",
"0.58.0-1",
"0.60.0-1",
"0.60.1-1",
"0.60.2-1",
"0.60.3-1",
"0.64.0-1",
"0.65.1-1",
"0.66.0-1",
"0.67.0-1",
"0.70.0-1",
"0.72.0-1",
"0.73.1-1",
"0.74.1-1",
"0.74.3-1",
"0.74.4-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-53433.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "fzf",
"purl": "pkg:deb/debian/fzf?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.60.3-1",
"0.64.0-1",
"0.65.1-1",
"0.66.0-1",
"0.67.0-1",
"0.70.0-1",
"0.72.0-1",
"0.73.1-1",
"0.74.1-1",
"0.74.3-1",
"0.74.4-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-53433.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.73.1-1"
}
]
}
],
"package": {
"name": "fzf",
"purl": "pkg:deb/debian/fzf?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.60.3-1",
"0.64.0-1",
"0.65.1-1",
"0.66.0-1",
"0.67.0-1",
"0.70.0-1",
"0.72.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-53433.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57337 · Revision 1
- Added to Heist Feed
- Publisher date