CVE-2026-56586

LOWPre-NVD 3.13.1—
EchelonGraph scoreHIGH confidence

Score 3.1 from GitHub Security Advisory (severity: LOW) published 2026-07-21. a secondary CVSS source baseline 3.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
3.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 3.1Exploit: NoneExposed: 0

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

HCL IEM was affected with X-Content-Type-Options Header Missing. It may enable attackers to perform SSL stripping or man-in-the-middle attacks and intercept sensitive data.

CVSS v3
3.1
EG Score
3.1(high)
EPSS
3.6%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 22, 2026

References (1)

Vendor Advisories for CVE-2026-56586(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 6× in last 7d / 6× 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. 2026-07-22 23:08 UTCEG score recompute
  2. 2026-07-22 23:08 UTCGHSA enrichment
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 17:22 UTCEG score recompute
  5. 2026-07-21 15:25 UTCEG score recompute
  6. 2026-07-21 15:23 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-56586?
CVE-2026-56586 is a low vulnerability published on July 21, 2026. HCL IEM was affected with X-Content-Type-Options Header Missing. It may enable attackers to perform SSL stripping or man-in-the-middle attacks and intercept sensitive data.
When was CVE-2026-56586 disclosed?
CVE-2026-56586 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56586 actively exploited?
CVE-2026-56586 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56586?
CVE-2026-56586 has a CVSS v3 base score of 3.1 (NVD).
How do I remediate CVE-2026-56586?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56586, 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

Explore the affected products and dependency analysis for CVE-2026-56586

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