TI-2026-54327 Aliases CVE-2026-78124 GHSA-693g-ppp7-3j2h

Memory leak in strongSwan

LOW 17CWE-401Published 2026-09-11 · Updated 2026-09-11

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Denial of service
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-401.

Summary

strongSwan 5.0.2 through 6.0.7 allows PKCS#7 certificate enumeration in the openssl plugin that leads to a lack of release of memory after its effective lifetime.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00254 16th percentileScored 2026-11-07

Fix Fixed strongSwan (strongSwan): 6.1.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
strongSwan	strongSwan	5.0.2 to before 6.1.0	6.1.0	Patch available	CNA

strongSwan VendorstrongSwan Affected 5.0.2 to before 6.1.0 Fixed in 6.1.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:strongswan:strongswan::::::::	5.0.2 to before 6.1.0	Vulnerable	strongSwan

cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:* Versions 5.0.2 to before 6.1.0 Vulnerable ·strongSwan

Remediation

Fix · CNA strongSwan (strongSwan) Fixed in 6.1.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-09-11
strongSwan 6.1.0
11 records Highest priority Priority LOW 11 LOW
Other records, highest priority first
- TI-2026-54334 Infinite loop in strongSwanPriority LOW 39
- TI-2026-54332 strongSwan 4.2.0 through 6.0.7 has a NULL pointer dereference in the x509 plugin's attribute certificate parser.Priority LOW 39
- TI-2026-54335 libcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.Priority LOW 35
Show all 11 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-78124
2026-10-03 Alias added: GHSA-693g-ppp7-3j2h

References

Patch 1

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

Advisory 1

https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78124).html

TI-2023-22300 strongSwan before 5.9.12 has a buffer overflow and possible unauthenticated remote code… CVSS 3.1CRITICAL 9.8
TI-2015-03374 strongSwan 5.2.2 and 5.3.0 allows remote attackers to cause a denial of service (daemon… CVSS 3.0CRITICAL 9.8
TI-2004-00531 FreeS/WAN 1.x and 2.x, and other related products including superfreeswan 1.x, openswan… CVSS 2.0HIGH 10.0
TI-2023-11610 strongSwan 5.9.8 and 5.9.9 potentially allows remote code execution because it uses a… CVSS 3.1CRITICAL 9.8
TI-2021-20414 In strongSwan before 5.9.5, a malicious responder can send an EAP-Success message too… CVSS 3.1CRITICAL 9.1
TI-2017-08240 The gmp plugin in strongSwan before 5.6.0 allows remote attackers to cause a denial of… CVSS 3.1HIGH 7.5

See all 47 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences