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TI-2026-38515 Aliases CVE-2026-53433GHSA-mvmf-94v6-879g

Denial of Service in fzf

Priority LOW 26CWE-407Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-407.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00378 32nd percentileScored 2026-11-07
Fix Fixed fzf (fzf): 0.73.1github.com/junegunn/fzf (Go): 0.73.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
fzffzfbefore 0.73.10.73.1Patch availableCNA
—github.com/junegunn/fzf (Go)before 0.73.10.73.1Patch availableGHSA-mvmf-94v6-879g
  • fzf Vendorfzf Affected before 0.73.1 Fixed in 0.73.1 Patch available CNA
  • github.com/junegunn/fzf (Go) Vendor— Affected before 0.73.1 Fixed in 0.73.1 Patch available GHSA-mvmf-94v6-879g

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:junegunn:fzf:*:*:*:*:*:*:*:*before 0.73.1Vulnerablejunegunn
  • cpe:2.3:a:junegunn:fzf:*:*:*:*:*:*:*:* Versions before 0.73.1 Vulnerable ·junegunn

Remediation

  • Fix · CNA fzf (fzf) Fixed in 0.73.1
  • Fix · GHSA-mvmf-94v6-879g github.com/junegunn/fzf (Go) Fixed in 0.73.1 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    fzf 0.73.1

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    Show all 2 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53433
  2. 2026-10-03 Alias added: GHSA-mvmf-94v6-879g

References

Patch 1

Advisory 2

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences