UBUNTU-CVE-2026-53433

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-53433
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53433.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-53433
Upstream
  • CVE-2026-53433
Published
2026-06-30T13:19:00Z
Modified
2026-07-03T21:45:30.861784041Z
Severity
  • 5.7 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:20.04:LTS / fzf

Package

Name
fzf
Purl
pkg:deb/ubuntu/fzf?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.18.0-2
0.18.0-3
0.19.0-1
0.20.0-1
0.20.0-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fzf",
            "binary_version": "0.20.0-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53433.json"

Ubuntu:22.04:LTS / fzf

Package

Name
fzf
Purl
pkg:deb/ubuntu/fzf?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.24.3-1
0.29.0-1
0.29.0-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fzf",
            "binary_version": "0.29.0-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53433.json"

Ubuntu:24.04:LTS / fzf

Package

Name
fzf
Purl
pkg:deb/ubuntu/fzf?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.42.0-1build1
0.44.1-1
0.44.1-1ubuntu0.1
0.44.1-1ubuntu0.2
0.44.1-1ubuntu0.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fzf",
            "binary_version": "0.44.1-1ubuntu0.3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53433.json"

Ubuntu:25.10 / fzf

Package

Name
fzf
Purl
pkg:deb/ubuntu/fzf?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.60.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fzf",
            "binary_version": "0.60.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53433.json"

Ubuntu:26.04:LTS / fzf

Package

Name
fzf
Purl
pkg:deb/ubuntu/fzf?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.60.3-1
0.66.0-1
0.67.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fzf",
            "binary_version": "0.67.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53433.json"