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strongSwan 4.6.2 through 6.0.7 has an infinite loop in PKCS#5 decryption. (CVE-2026-78129)

0
Medium
VulnerabilityCVE-2026-78129gcveosvubuntu-cve-2026-78129cve-2026-78129ubuntu-pro-14-04-ltsubuntu-pro-16-04-ltsubuntu-pro-fips-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-fips-updates-18-04-ubuntu-pro-fips-18-04-ltsubuntu-20-04-ltsubuntu-pro-fips-updates-20-04-ubuntu-pro-fips-20-04-ltsubuntu-22-04-ltsubuntu-pro-fips-preview-22-04-ubuntu-pro-fips-updates-22-04-ubuntu-24-04-ltsubuntu-26-04-lts
Published: 09/07/2026 (09/07/2026, 12:00:00 UTC)
Source: GCVE Database
Product: strongswan

Description

strongSwan 4.6.2 through 6.0.7 has an infinite loop in PKCS#5 decryption.

CVSS v3.1

Score 5.9medium

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

Ubuntu:Pro:14.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=esm-infra-legacy/trusty
Affected versions
=4.6.4-9=5.1.0-2=5.1.0-3=5.1.1-0ubuntu1=5.1.1-0ubuntu2=5.1.1-0ubuntu3=5.1.1-0ubuntu4=5.1.1-0ubuntu5=5.1.1-0ubuntu7=5.1.1-0ubuntu14=5.1.1-0ubuntu17=5.1.2~dr3+git20130120-0ubuntu2=5.1.2~dr3+git20130120-0ubuntu3=5.1.2~rc1-0ubuntu3=5.1.2~rc1-0ubuntu4=5.1.2~rc2-0ubuntu2=5.1.2-0ubuntu1=5.1.2-0ubuntu2=5.1.2-0ubuntu2.2=5.1.2-0ubuntu2.3=5.1.2-0ubuntu2.4=5.1.2-0ubuntu2.5=5.1.2-0ubuntu2.6=5.1.2-0ubuntu2.7=5.1.2-0ubuntu2.8=5.1.2-0ubuntu2.10=5.1.2-0ubuntu2.11=5.1.2-0ubuntu2.11+esm1=5.1.2-0ubuntu2.11+esm2=5.1.2-0ubuntu2.11+esm3
Ubuntu:Pro:16.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=esm-infra/xenial
Affected versions
=5.1.2-0ubuntu6=5.1.2-0ubuntu7=5.1.2-0ubuntu8=5.3.5-1ubuntu1=5.3.5-1ubuntu2=5.3.5-1ubuntu3=5.3.5-1ubuntu3.1=5.3.5-1ubuntu3.2=5.3.5-1ubuntu3.3=5.3.5-1ubuntu3.4=5.3.5-1ubuntu3.5=5.3.5-1ubuntu3.7=5.3.5-1ubuntu3.8=5.3.5-1ubuntu3.8+esm1=5.3.5-1ubuntu3.8+esm2=5.3.5-1ubuntu3.8+esm3=5.3.5-1ubuntu3.8+esm4
Ubuntu:Pro:FIPS:16.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=fips-updates/xenial
Affected versions
=5.3.5-1ubuntu3.fips.3.4.1=5.3.5-1ubuntu3.fips.3.4.2=5.3.5-1ubuntu3.fips.3.8.1=5.3.5-1ubuntu3.fips.3.8.2=5.3.5-1ubuntu3.fips.3.8.3=5.3.5-1ubuntu3.fips.3.8.6=5.3.5-1ubuntu3.fips.3.8.7
Ubuntu:Pro:FIPS:16.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=fips/xenial
Affected versions
=5.3.5-1ubuntu3.fips.3.1=5.3.5-1ubuntu3.fips.3.2=5.3.5-1ubuntu3.fips.3.3
Ubuntu:Pro:18.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=esm-infra/bionic
Affected versions
=5.5.1-4ubuntu2=5.5.1-4ubuntu3=5.6.1-2ubuntu1=5.6.1-2ubuntu2=5.6.1-2ubuntu3=5.6.1-2ubuntu4=5.6.2-1ubuntu2=5.6.2-1ubuntu2.2=5.6.2-1ubuntu2.3=5.6.2-1ubuntu2.4=5.6.2-1ubuntu2.5=5.6.2-1ubuntu2.6=5.6.2-1ubuntu2.7=5.6.2-1ubuntu2.8=5.6.2-1ubuntu2.9=5.6.2-1ubuntu2.9+esm1
Ubuntu:Pro:FIPS-updates:18.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=fips-updates/bionic
Affected versions
=5.6.2-1ubuntu2.fips.2.5.1=5.6.2-1ubuntu2.fips.2.7.1=5.6.2-1ubuntu2.fips.2.7.2=5.6.2-1ubuntu2.fips.2.8.1=5.6.2-1ubuntu2.fips.2.9=5.6.2-1ubuntu2.fips.2.9+esm1
Ubuntu:Pro:FIPS:18.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=fips/bionic
Affected versions
=5.6.2-1ubuntu2.fips.2.4.2=5.6.2-1ubuntu2.fips.2.5.1
Ubuntu:20.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=focal
Affected versions
=5.7.2-1ubuntu3=5.8.1-1ubuntu1=5.8.2-1ubuntu1=5.8.2-1ubuntu2=5.8.2-1ubuntu3=5.8.2-1ubuntu3.1=5.8.2-1ubuntu3.2=5.8.2-1ubuntu3.3=5.8.2-1ubuntu3.4=5.8.2-1ubuntu3.5=5.8.2-1ubuntu3.6
Ubuntu:Pro:FIPS-updates:20.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=fips-updates/focal
Affected versions
=5.8.2-1ubuntu3.fips.3.1.2=5.8.2-1ubuntu3.fips.3.3.1=5.8.2-1ubuntu3.fips.3.4.1=5.8.2-1ubuntu3.fips.3.5=5.8.2-1ubuntu3.fips.3.6
Ubuntu:Pro:FIPS:20.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=fips/focal
Affected versions
=5.8.2-1ubuntu3.fips.3.1.2
Ubuntu:22.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=jammy
Affected versions
<5.9.5-2ubuntu2.8=5.9.1-1ubuntu3=5.9.1-1ubuntu3.1=5.9.4-1ubuntu1=5.9.4-1ubuntu2=5.9.4-1ubuntu3=5.9.4-1ubuntu4=5.9.5-2ubuntu1=5.9.5-2ubuntu2=5.9.5-2ubuntu2.1=5.9.5-2ubuntu2.2=5.9.5-2ubuntu2.3=5.9.5-2ubuntu2.4=5.9.5-2ubuntu2.5=5.9.5-2ubuntu2.6=5.9.5-2ubuntu2.7
Ubuntu:Pro:FIPS-preview:22.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=fips-preview/jammy
Affected versions
=5.9.5-2ubuntu2.1+Fips1=5.9.5-2ubuntu2.2+Fips1
Ubuntu:Pro:FIPS-updates:22.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=fips-updates/jammy
Affected versions
=5.9.5-2ubuntu2.1+Fips1=5.9.5-2ubuntu2.2+Fips1=5.9.5-2ubuntu2.3+Fips1=5.9.5-2ubuntu2.4+Fips1=5.9.5-2ubuntu2.5+Fips1=5.9.5-2ubuntu2.6+Fips1=5.9.5-2ubuntu2.7+Fips1
Ubuntu:24.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=noble
Affected versions
<5.9.13-2ubuntu4.24.04.5=5.9.11-1ubuntu1=5.9.11-1ubuntu2=5.9.12-1ubuntu1=5.9.13-2ubuntu1=5.9.13-2ubuntu3=5.9.13-2ubuntu4=5.9.13-2ubuntu4.24.04.1=5.9.13-2ubuntu4.24.04.2=5.9.13-2ubuntu4.24.04.3=5.9.13-2ubuntu4.24.04.4
Ubuntu:26.04:LTSmore threats →ghsa
strongswan
pkg:deb/ubuntu/strongswan?arch=source&distro=resolute
Affected versions
<6.0.4-1ubuntu3.2=6.0.1-6ubuntu4=6.0.1-6ubuntu5=6.0.4-1ubuntu1=6.0.4-1ubuntu2=6.0.4-1ubuntu3=6.0.4-1ubuntu3.1

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-78129
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:FIPS:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:FIPS-updates:18.04:LTS","Ubuntu:Pro:FIPS:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:Pro:FIPS-updates:20.04:LTS","Ubuntu:Pro:FIPS:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Pro:FIPS-preview:22.04:LTS","Ubuntu:Pro:FIPS-updates:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
Cvss Version
3.1

Patch Information

Threat ID: 6ab1e395f7a7c541064730c4

Added to database: 09/22/2026, 02:10:29 UTC

Last updated: 09/22/2026, 02:10:29 UTC

Views: 1

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