CVE-2026-78123

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 — 3 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

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

strongSwan 5.0.2 through 6.0.7 has an Expired Pointer Dereference in PKCS#7 parsing in the openssl 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
35%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 15, 2026

Advisory Details (2)

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

strongSwan - strongSwan Vulnerability (CVE-2026-78123)

https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78123).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-2026-78123(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 22× in last 7d / 29× 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. 2026-09-19 07:30 UTCEG score recompute
  2. 2026-09-19 07:30 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 09:47 UTCEG score recompute
  5. 2026-09-18 09:47 UTCGHSA enrichment
  6. 2026-09-17 12:03 UTCGHSA enrichment
  7. 2026-09-16 14:19 UTCEG score recompute
  8. 2026-09-16 14:19 UTCGHSA enrichment
  9. 2026-09-16 14:08 UTCEPSS rescore
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-15 16:35 UTCEG score recompute
  12. 2026-09-15 16:35 UTCGHSA enrichment
  13. 2026-09-15 15:33 UTCEG score recompute
  14. 2026-09-15 15:33 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 20:14 UTCGHSA enrichment
  18. 2026-09-14 08:19 UTCEG score recompute
  19. 2026-09-14 08:19 UTCGHSA enrichment
  20. 2026-09-13 10:35 UTCEG score recompute
  21. 2026-09-13 10:35 UTCGHSA enrichment
  22. 2026-09-12 12:51 UTCGHSA enrichment
  23. 2026-09-11 15:07 UTCEG score recompute
  24. 2026-09-11 15:07 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 4 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 02:20 UTCEG score recompute
  3. 2026-09-11 01:30 UTCEG score recompute
  4. 2026-09-11 01:29 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-78123?
CVE-2026-78123 is a medium vulnerability published on September 11, 2026. strongSwan 5.0.2 through 6.0.7 has an Expired Pointer Dereference in PKCS#7 parsing in the openssl plugin.
When was CVE-2026-78123 disclosed?
CVE-2026-78123 was first published in the National Vulnerability Database on September 11, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78123 actively exploited?
CVE-2026-78123 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 64.8% of all scored CVEs.
What is the CVSS score of CVE-2026-78123?
CVE-2026-78123 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-78123?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78123, 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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