CVE-2026-78126

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreHIGH confidence

Score 5.9 from GitHub Security Advisory published 2026-09-11. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0

A fix is available — apply it.

strongSwan 4.1.10 through 6.0.7 allows a NULL pointer dereference in the eap-aka plugin.

CVSS v3
5.9
EG Score
5.9(high)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity59% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 14, 2026

Advisory Details (2)

Auto-updated Sep 11, 2026
Patch available. Sources: github_release.
generic

strongSwan - strongSwan Vulnerability (CVE-2026-78126)

https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78126).html
github_release Patch Available

strongSwan 6.1.0

Patch available: strongswan/strongswan 6.1.0

https://github.com/strongswan/strongswan/releases/tag/6.1.0

Vendor Advisories for CVE-2026-78126(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntustrongswan-swanctl (6.0.4-1ubuntu3.2) @ resolute2026-09-25ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 24× in last 7d / 51× 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. 2026-09-25 02:50 UTCEG score recompute
  2. 2026-09-25 02:50 UTCVendor advisory
  3. 2026-09-25 02:50 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 02:10 UTCEG score recompute
  6. 2026-09-24 02:10 UTCVendor advisory
  7. 2026-09-24 02:10 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 01:31 UTCEG score recompute
  10. 2026-09-23 01:31 UTCVendor advisory
  11. 2026-09-23 01:31 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 00:51 UTCEG score recompute
  14. 2026-09-22 00:51 UTCVendor advisory
  15. 2026-09-22 00:51 UTCGHSA enrichment
  16. 2026-09-21 21:09 UTCEPSS rescore
  17. 2026-09-21 00:12 UTCEG score recompute
  18. 2026-09-21 00:12 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-19 23:32 UTCEG score recompute
  21. 2026-09-19 23:32 UTCGHSA enrichment
  22. 2026-09-18 22:53 UTCEG score recompute
  23. 2026-09-18 22:53 UTCGHSA enrichment
  24. 2026-09-18 19:28 UTCEPSS rescore
  25. 2026-09-17 22:14 UTCEG score recompute
Show 26 more
  1. 2026-09-17 22:14 UTCGHSA enrichment
  2. 2026-09-16 21:34 UTCEG score recompute
  3. 2026-09-16 21:34 UTCGHSA enrichment
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-15 20:54 UTCEG score recompute
  7. 2026-09-15 20:54 UTCGHSA enrichment
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-14 20:14 UTCGHSA enrichment
  11. 2026-09-14 19:22 UTCEG score recompute
  12. 2026-09-14 19:22 UTCGHSA enrichment
  13. 2026-09-14 18:28 UTCEG score recompute
  14. 2026-09-14 18:28 UTCGHSA enrichment
  15. 2026-09-14 17:05 UTCEG score recompute
  16. 2026-09-14 17:05 UTCGHSA enrichment
  17. 2026-09-13 16:25 UTCGHSA enrichment
  18. 2026-09-12 15:46 UTCEG score recompute
  19. 2026-09-12 15:46 UTCGHSA enrichment
  20. 2026-09-11 15:07 UTCEG score recompute
  21. 2026-09-11 15:07 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 02:20 UTCEG score recompute
  25. 2026-09-11 01:45 UTCEG score recompute
  26. 2026-09-11 01:44 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-78126?
CVE-2026-78126 is a medium vulnerability published on September 11, 2026. strongSwan 4.1.10 through 6.0.7 allows a NULL pointer dereference in the eap-aka plugin.
When was CVE-2026-78126 disclosed?
CVE-2026-78126 was first published in the National Vulnerability Database on September 11, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78126 actively exploited?
CVE-2026-78126 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 67.3% of all scored CVEs.
What is the CVSS score of CVE-2026-78126?
CVE-2026-78126 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-78126?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78126, 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-2026-78126

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