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TI-2026-79257 Aliases CVE-2026-115319GHSA-9q8r-c9q4-p63h

Denial of service in fzf via maskActionContents

Priority LOW 10CWE-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 · Low
Fix status
No fix listed

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

Summary

fzf versions from 0.36.0 through 0.74.5 are affected by an inefficient algorithmic complexity flaw (CWE-407) in maskActionContents. Quadratic string concatenation makes processing of large request bodies very slow. A local attacker can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port of the --listen HTTP server, blocking its single-threaded process for about 30 seconds each time.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

fzf 0.36.0 through 0.74.5 contains an inefficient algorithmic complexity vulnerability in maskActionContents that allows local attackers to exhaust the --listen HTTP server through quadratic string concatenation. Attackers can repeatedly send POST bodies of about 1 MB to the unauthenticated localhost port, blocking the single-threaded server for about 30 seconds each time.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00101 0th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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
junegunnfzf0.36.0 – 0.74.5—No fix listedCNA
  • fzf Vendorjunegunn Affected 0.36.0 – 0.74.5 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for fzf.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-115319
  2. 2026-10-22 Alias added: GHSA-9q8r-c9q4-p63h
  3. 2026-10-23 Affected versions changed · Red Hat
  4. 2026-10-23 CVSS score added · Red Hat
  5. 2026-10-29 CISA SSVC decision points changed

References

Patch 1

Other 2

Sources

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