CVE-2026-78133

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-11. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 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

A fix is available — apply it.

libcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
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-2026-78133)

https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78133).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-2026-78133(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

(2)

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 41× in last 7d / 80× 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 02:53 UTCVendor advisory
  2. 2026-09-25 02:53 UTCGHSA enrichment
  3. 2026-09-24 15:13 UTCEG score recompute
  4. 2026-09-24 15:13 UTCVendor advisory
  5. 2026-09-24 15:13 UTCGHSA enrichment
  6. 2026-09-24 14:04 UTCEPSS rescore
  7. 2026-09-24 03:31 UTCEG score recompute
  8. 2026-09-24 03:31 UTCVendor advisory
  9. 2026-09-24 03:31 UTCGHSA enrichment
  10. 2026-09-23 17:54 UTCEPSS rescore
  11. 2026-09-23 15:51 UTCVendor advisory
  12. 2026-09-23 15:51 UTCGHSA enrichment
  13. 2026-09-23 04:11 UTCVendor advisory
  14. 2026-09-23 04:11 UTCGHSA enrichment
  15. 2026-09-22 16:31 UTCEG score recompute
  16. 2026-09-22 16:31 UTCVendor advisory
  17. 2026-09-22 16:31 UTCGHSA enrichment
  18. 2026-09-22 16:01 UTCEPSS rescore
  19. 2026-09-22 04:50 UTCEG score recompute
  20. 2026-09-22 04:50 UTCVendor advisory
  21. 2026-09-22 04:50 UTCGHSA enrichment
  22. 2026-09-21 21:09 UTCEPSS rescore
  23. 2026-09-21 17:10 UTCVendor advisory
  24. 2026-09-21 17:10 UTCGHSA enrichment
  25. 2026-09-21 05:30 UTCEG score recompute
Show 55 more
  1. 2026-09-21 05:30 UTCVendor advisory
  2. 2026-09-21 05:30 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 17:50 UTCVendor advisory
  5. 2026-09-20 17:50 UTCGHSA enrichment
  6. 2026-09-20 06:10 UTCVendor advisory
  7. 2026-09-20 06:10 UTCGHSA enrichment
  8. 2026-09-19 18:30 UTCEG score recompute
  9. 2026-09-19 18:30 UTCVendor advisory
  10. 2026-09-19 18:30 UTCGHSA enrichment
  11. 2026-09-19 06:50 UTCEG score recompute
  12. 2026-09-19 06:50 UTCVendor advisory
  13. 2026-09-19 06:50 UTCGHSA enrichment
  14. 2026-09-18 19:28 UTCEPSS rescore
  15. 2026-09-18 19:05 UTCVendor advisory
  16. 2026-09-18 19:05 UTCGHSA enrichment
  17. 2026-09-18 07:25 UTCVendor advisory
  18. 2026-09-18 07:25 UTCGHSA enrichment
  19. 2026-09-17 19:45 UTCEG score recompute
  20. 2026-09-17 19:45 UTCVendor advisory
  21. 2026-09-17 19:45 UTCGHSA enrichment
  22. 2026-09-17 06:43 UTCGHSA enrichment
  23. 2026-09-16 19:01 UTCEG score recompute
  24. 2026-09-16 19:01 UTCGHSA enrichment
  25. 2026-09-16 14:08 UTCEPSS rescore
  26. 2026-09-16 07:22 UTCEG score recompute
  27. 2026-09-16 07:22 UTCGHSA enrichment
  28. 2026-09-16 05:15 UTCEPSS rescore
  29. 2026-09-15 19:42 UTCGHSA enrichment
  30. 2026-09-15 07:54 UTCEG score recompute
  31. 2026-09-15 07:54 UTCGHSA enrichment
  32. 2026-09-15 03:12 UTCEPSS rescore
  33. 2026-09-15 03:12 UTCEPSS rescore
  34. 2026-09-14 20:14 UTCGHSA enrichment
  35. 2026-09-14 15:31 UTCGHSA enrichment
  36. 2026-09-14 03:51 UTCEG score recompute
  37. 2026-09-14 03:51 UTCGHSA enrichment
  38. 2026-09-13 16:11 UTCGHSA enrichment
  39. 2026-09-13 04:32 UTCGHSA enrichment
  40. 2026-09-12 16:52 UTCEG score recompute
  41. 2026-09-12 16:52 UTCGHSA enrichment
  42. 2026-09-12 05:12 UTCGHSA enrichment
  43. 2026-09-11 17:32 UTCEG score recompute
  44. 2026-09-11 17:32 UTCGHSA enrichment
  45. 2026-09-11 16:59 UTCEG score recompute
  46. 2026-09-11 16:59 UTCGHSA enrichment
  47. 2026-09-11 15:07 UTCEG score recompute
  48. 2026-09-11 15:07 UTCGHSA enrichment
  49. 2026-09-11 14:53 UTCEPSS rescore
  50. 2026-09-11 14:53 UTCEPSS rescore
  51. 2026-09-11 14:00 UTCEG score recompute
  52. 2026-09-11 14:00 UTCGHSA enrichment
  53. 2026-09-11 02:20 UTCEG score recompute
  54. 2026-09-11 02:00 UTCEG score recompute
  55. 2026-09-11 01:59 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-78133?
CVE-2026-78133 is a high vulnerability published on September 11, 2026. libcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.
When was CVE-2026-78133 disclosed?
CVE-2026-78133 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-2026-78133 actively exploited?
CVE-2026-78133 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 65.9% of all scored CVEs.
What is the CVSS score of CVE-2026-78133?
CVE-2026-78133 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-78133?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78133, 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-2026-78133

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