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Vulnerabilities

Vulnerability · CVE-2026-115319

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

Published Oct 22, 2026 · catalog updated Oct 24, 2026 · fzf 0.36.0 through 0.74.5

Last checked Nov 7, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-115319. EPSS is 0.10%. Act only if a listed version of fzf 0.36.0 through 0.74.5 is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (fzf 0.36.0 through 0.74.5).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.10%
Remediation
Advisory link
Affected products
Debian:12 fzf · Debian:13 fzf · Debian:14 fzf

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 fzf0.38.0-1, 0.42.0-1, 0.44.1-1
  • Debian:13 fzf0.60.3-1, 0.64.0-1, 0.65.1-1
  • Debian:14 fzf0.60.3-1, 0.64.0-1, 0.65.1-1

How to fix CVE-2026-115319

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-115319. EPSS is 0.10%. Act only if a listed version of fzf 0.36.0 through 0.74.5 is installed.

Which versions are affected?

Compare what you have installed with 0.38.0-1, 0.42.0-1, 0.44.1-1, 0.60.3-1, 0.64.0-1, 0.65.1-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-407. EPSS 0.10%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 22, 2026 · NIST NVD

    Detected

    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.

  2. Oct 24, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-115319

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-115319

    30-day exploitation probability 0.10%

    first.org
  • NIST NVDVulnerability recordCVE-2026-115319

    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 unau

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-115319
    osv.dev

References

Freshness

Last verified in this catalog Nov 7, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 7, 2026
  • OpenSSF OSV / OSV ScannerOct 24, 2026
  • CVE.orgOct 22, 2026
  • NIST NVDOct 22, 2026