CVE-2026-78135
HIGH
7.3
CVSS Score
Published: September 11, 2026 at 02:07 AM UTC
Updated: September 16, 2026 at 07:54 PM UTC
1 product affected across 1 vendorstrongSwan
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Severity
HIGH7.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit
Description
libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authentication bypass.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 6.1.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (2)
Release NotesVendor Advisory
Source: cverecord
https://github.com/strongswan/strongswan/releases/tag/6.1.0Vendor AdvisoryMitigation
Source: cverecord
https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78135).htmlSSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- LOW
Vector?
Quick Info
StatusANALYZED
CWE
CWE-841
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