---
id: CVE-2026-78127
title: >-
  libcharon in strongSwan 4.1.2 through 6.0.7 has a missing release of memory
  after its effective lifetime in the IKE message parser.
summary: >-
  libcharon in strongSwan 4.1.2 through 6.0.7 has a missing release of memory
  after its effective lifetime in the IKE message parser.
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-401
vendor: strongswan
product: strongswan
affected:
  - 'strongswan >= 4.1.2, < 6.1.0'
patched:
  - strongswan 6.1.0
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:09:10.940'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78127'
references:
  - url: 'https://github.com/strongswan/strongswan/releases/tag/6.1.0'
    label: cve@mitre.org
  - url: >-
      https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78127).html
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
epss: 0.00353
epssPercentile: 0.26336
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-11T17:20:25.810055Z'
ingestedAt: '2026-09-14T00:35:28.536Z'
---

## Overview

libcharon in strongSwan 4.1.2 through 6.0.7 has a missing release of memory after its effective lifetime in the IKE message parser.

## Affected

- `strongswan >= 4.1.2, < 6.1.0`

## Remediation

Upgrade past the affected range:

- `strongswan 6.1.0`