CVE-2026-71217

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

A flaw was found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control-channel JSON with oversized numeric parameters, such as parallel and len, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread creation, as well as large buffer allocations, causing resource exhaustion. Consequently, this can result in a Denial of Service (DoS) on the affected iperf3 server.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Aug 11, 2026
Patch available. Sources: redhat.
redhat

2460984 – (CVE-2026-71217) CVE-2026-71217 iperf3: iperf3 server accepts unbounded peer-controlled JSON parameters enabling remote denial of service via resource exhaustion

https://bugzilla.redhat.com/show_bug.cgi?id=2460984
redhat Patch Available

CVE-2026-71217 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-71217

Vendor Advisories for CVE-2026-71217(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 31× in last 7d / 49× 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. 2026-08-21 00:30 UTCEG score recompute
  2. 2026-08-21 00:30 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 12:05 UTCGHSA enrichment
  5. 2026-08-19 23:39 UTCEG score recompute
  6. 2026-08-19 23:39 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 11:15 UTCGHSA enrichment
  9. 2026-08-18 22:47 UTCEG score recompute
  10. 2026-08-18 22:47 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 10:16 UTCGHSA enrichment
  14. 2026-08-17 21:51 UTCEG score recompute
  15. 2026-08-17 21:50 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 09:22 UTCGHSA enrichment
  18. 2026-08-16 20:58 UTCEG score recompute
  19. 2026-08-16 20:58 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 08:33 UTCEG score recompute
  23. 2026-08-16 08:33 UTCGHSA enrichment
  24. 2026-08-16 02:15 UTCEPSS rescore
  25. 2026-08-15 20:09 UTCGHSA enrichment
Show 24 more
  1. 2026-08-15 07:44 UTCEG score recompute
  2. 2026-08-15 07:44 UTCGHSA enrichment
  3. 2026-08-15 01:31 UTCEPSS rescore
  4. 2026-08-14 19:19 UTCGHSA enrichment
  5. 2026-08-14 07:57 UTCEG score recompute
  6. 2026-08-14 07:57 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 19:32 UTCGHSA enrichment
  9. 2026-08-13 07:07 UTCGHSA enrichment
  10. 2026-08-12 18:37 UTCEG score recompute
  11. 2026-08-12 18:37 UTCGHSA enrichment
  12. 2026-08-12 13:51 UTCEPSS rescore
  13. 2026-08-12 06:12 UTCGHSA enrichment
  14. 2026-08-11 17:45 UTCEG score recompute
  15. 2026-08-11 17:45 UTCGHSA enrichment
  16. 2026-08-11 16:26 UTCEG score recompute
  17. 2026-08-11 16:26 UTCGHSA enrichment
  18. 2026-08-11 11:24 UTCEG score recompute
  19. 2026-08-11 11:24 UTCGHSA enrichment
  20. 2026-08-11 10:22 UTCEG score recompute
  21. 2026-08-11 10:22 UTCGHSA enrichment
  22. 2026-08-11 09:26 UTCEG score recompute
  23. 2026-08-11 09:13 UTCEG score recompute
  24. 2026-08-11 09:13 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71217?
CVE-2026-71217 is a high vulnerability published on August 11, 2026. A flaw was found in iperf3. A remote attacker can exploit this vulnerability by sending crafted control-channel JSON with oversized numeric parameters, such as parallel and len, which are not properly validated by the server. This improper input validation can lead to excessive stream and thread…
When was CVE-2026-71217 disclosed?
CVE-2026-71217 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71217 actively exploited?
CVE-2026-71217 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 64.9% of all scored CVEs.
What is the CVSS score of CVE-2026-71217?
CVE-2026-71217 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-71217?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71217, 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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