Data processing vulnerability in the certificate management module. Impact: Successful exploitation of this vulnerability may affect service confidentiality.
CVE-2026-28539
MEDIUMNVD 5.56.2▲
EchelonGraph scoreMEDIUM confidence
Score 6.2 from GitHub Security Advisory published 2026-03-05. NVD baseline CVSS 5.5; sources differ by 0.7.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, nvd
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.5
- EG Score
- 6.2(medium)
- EG Risk
- 32(Track)EG Risk 32/100SSVC: 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 computedSeverity62% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 0%
- KEV
- Not listed
Published
March 5, 2026
Last Modified
June 17, 2026
References (2)
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 2× in last 7d / 2× 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.
- 2026-07-27 13:51 UTCEG score recompute
- 2026-07-27 13:51 UTCGHSA enrichment
Related CVEs(same CWE)
Same CWE
10 shownCWE-19
- CVE-1999-0226EG 10.0EPSS p93HIGH
- CVE-2014-10039EG 9.8CRITICAL
- CVE-2012-5358EG 9.8CRITICAL
- CVE-2012-5357EG 9.8EPSS p99CRITICAL
- CVE-2015-3991EG 9.8EPSS p91CRITICAL
- CVE-2016-0761EG 9.8CRITICAL
- CVE-2014-9693EG 9.8CRITICAL
- CVE-2016-2783EG 9.8EPSS p90CRITICAL
- CVE-2016-7117EG 9.8EPSS p98CRITICAL
- CVE-2016-3236EG 9.8EPSS p100CRITICAL
Frequently asked(5)
What is CVE-2026-28539?
CVE-2026-28539 is a medium vulnerability published on March 5, 2026. Data processing vulnerability in the certificate management module. Impact: Successful exploitation of this vulnerability may affect service confidentiality.
When was CVE-2026-28539 disclosed?
CVE-2026-28539 was first published in the National Vulnerability Database on March 5, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28539 actively exploited?
CVE-2026-28539 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 100.0% of all scored CVEs.
What is the CVSS score of CVE-2026-28539?
CVE-2026-28539 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.2.
How do I remediate CVE-2026-28539?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28539, 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-2026-28539
Is Your Infrastructure Affected by CVE-2026-28539?
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