CVE-2026-53433

HIGHNVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory published 2026-06-30. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
11.9%
KEV
Not listed

Published

June 30, 2026

Last Modified

July 2, 2026

Advisory Details (3)

Auto-updated Jun 30, 2026
Patch available. Sources: github_commit.
github_commit

commit 7963a2c6586c (junegunn/fzf)

Fix landed in junegunn/fzf commit 7963a2c6586c — awaiting tagged release

https://github.com/junegunn/fzf/commit/7963a2c6586c0b9eaa89b8995de8f0e08cf8a4ce
generic

GitHub - junegunn/fzf: :cherry_blossom: A command-line fuzzy finder · GitHub

https://github.com/junegunn/fzf
generic Patch Available

Vulnerabilities in fzf software | CERT Polska

https://cert.pl/en/posts/2026/06/CVE-2026-53432

Vendor Advisories for CVE-2026-53433(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 30× in last 7d / 30× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 15:51 UTCEG score recompute
  4. 2026-07-06 15:51 UTCGHSA enrichment
  5. 2026-07-06 02:42 UTCEG score recompute
  6. 2026-07-06 02:42 UTCGHSA enrichment
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 13:34 UTCEG score recompute
  10. 2026-07-05 13:34 UTCGHSA enrichment
  11. 2026-07-05 02:31 UTCEPSS rescore
  12. 2026-07-05 02:30 UTCEPSS rescore
  13. 2026-07-05 00:25 UTCEG score recompute
  14. 2026-07-05 00:25 UTCGHSA enrichment
  15. 2026-07-04 11:17 UTCEG score recompute
  16. 2026-07-04 11:17 UTCGHSA enrichment
  17. 2026-07-04 06:31 UTCEPSS rescore
  18. 2026-07-04 06:31 UTCEPSS rescore
  19. 2026-07-03 22:09 UTCEG score recompute
  20. 2026-07-03 22:09 UTCGHSA enrichment
  21. 2026-07-03 09:00 UTCEG score recompute▲ 1.80
  22. 2026-07-03 09:00 UTCGHSA enrichment
  23. 2026-07-02 20:05 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  24. 2026-07-02 10:54 UTCEG score recompute
  25. 2026-07-02 10:54 UTCGHSA enrichment
Show 5 more
  1. 2026-07-01 15:07 UTCEPSS rescore
  2. 2026-07-01 12:38 UTCEG score recompute
  3. 2026-07-01 12:38 UTCGHSA enrichment
  4. 2026-06-30 14:33 UTCEG score recompute
  5. 2026-06-30 14:32 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-53433?
CVE-2026-53433 is a high vulnerability published on June 30, 2026. 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…
When was CVE-2026-53433 disclosed?
CVE-2026-53433 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53433 actively exploited?
CVE-2026-53433 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-53433?
CVE-2026-53433 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-53433?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53433, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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