Infinite Loop Vulnerability in strongSwan's X.509 Plugin
CVE-2026-78132

7.5HIGH

Key Information:

Vendor

Strongswan

Status
Strongswan
Vendor
CVE Published:
11 September 2026

What is CVE-2026-78132?

The strongSwan software, specifically versions 5.1.3 through 6.0.7, is susceptible to an infinite loop vulnerability within the X.509 plugin's attribute certificate parser for ietfAttrSyntax. This flaw may cause the application to enter an unresponsive state when processing certain attribute certificates, potentially leading to Denial of Service (DoS) conditions. Administrators are advised to update to the patched version to mitigate this issue.

Affected Version(s)

strongSwan 5.1.3 < 6.1.0

References

https://www.strongswan.org/blog/2026/09/07/strongswan-vul...
https://github.com/strongswan/strongswan/releases/tag/6.1.0

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.