CVE catalog

CVE-2026-78135

strongSwan vulnerabilities

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: Sep 7, 2026, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.42% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	strongswan	sid	`6.1.0-2`	fixed
Debian	strongswan	forky	`6.1.0-2`	fixed
Debian	strongswan	trixie	`6.0.1-6+deb13u6`	vulnerable
Debian	strongswan	trixie-security	`6.0.1-6+deb13u7`	fixed
Debian	strongswan	bookworm	`5.9.8-5+deb12u5`	vulnerable
Debian	strongswan	bookworm-security	`5.9.8-5+deb12u5`	vulnerable
Cpe	strongswan	Not reported	Not reported	unknown
Ubuntu	strongswan	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	charon-cmd	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	charon-systemd	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	libcharon-extauth-plugins	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	libcharon-extra-plugins	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	libstrongswan	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	libstrongswan-extra-plugins	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	libstrongswan-standard-plugins	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	strongswan-charon	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	strongswan-libcharon	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	strongswan-nm	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	strongswan-pki	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	strongswan-starter	noble	`5.9.13-2ubuntu4.24.04.5`	fixed
Ubuntu	strongswan-swanctl	noble	`5.9.13-2ubuntu4.24.04.5`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	strongswan	source	sid	`6.1.0-1`	not yet assigned	Not reported	Not reported
Debian	strongswan	source	forky	`6.1.0-1`	not yet assigned	Not reported	Not reported
Debian	strongswan	source	trixie	`6.0.1-6+deb13u7`	not yet assigned	Not reported	Not reported
Debian	strongswan	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Ubuntu	strongswan	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	charon-cmd	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	charon-systemd	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	libcharon-extauth-plugins	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	libcharon-extra-plugins	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	libstrongswan	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	libstrongswan-extra-plugins	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	libstrongswan-standard-plugins	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	strongswan-charon	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	strongswan-libcharon	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	strongswan-nm	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	strongswan-pki	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	strongswan-starter	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported
Ubuntu	strongswan-swanctl	deb	noble	`5.9.13-2ubuntu4.24.04.5`	Not reported	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[charon-cmd]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[charon-systemd]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[libcharon-extauth-plugins]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[libcharon-extra-plugins]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[libstrongswan]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[libstrongswan-extra-plugins]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[libstrongswan-standard-plugins]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[strongswan]Affected
Details (4)
- 5.9.8-5+deb12u5 · all · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · all · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · all · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · all · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[strongswan-charon]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[strongswan-libcharon]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[strongswan-nm]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[strongswan-pki]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[strongswan-starter]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
[strongswan-swanctl]Affected
Source package: [strongswan]
Details (4)
- 5.9.8-5+deb12u5 · amd64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · amd64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12
- 5.9.8-5+deb12u5 · arm64 · bookworm-security
  Affected
  usn · strongswan · debian · bookworm; usn · strongswan · debian · 12

[Debian 13 (Trixie)]

[charon-cmd]Affected
Source package: [strongswan]
Details (5)
- 6.0.1-6+deb13u6 · amd64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · amd64 · trixie-security · Historical version
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie-security
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
[charon-systemd]Affected
Source package: [strongswan]
Details (5)
- 6.0.1-6+deb13u6 · amd64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · amd64 · trixie-security · Historical version
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie-security
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
[libcharon-extauth-plugins]Affected
Source package: [strongswan]
Details (5)
- 6.0.1-6+deb13u6 · amd64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · amd64 · trixie-security · Historical version
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie-security
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
[libcharon-extra-plugins]Affected
Source package: [strongswan]
Details (5)
- 6.0.1-6+deb13u6 · amd64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · amd64 · trixie-security · Historical version
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie-security
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
[libstrongswan]Affected
Source package: [strongswan]
Details (5)
- 6.0.1-6+deb13u6 · amd64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · amd64 · trixie-security · Historical version
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie-security
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
[libstrongswan-extra-plugins]Affected
Source package: [strongswan]
Details (5)
- 6.0.1-6+deb13u6 · amd64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · amd64 · trixie-security · Historical version
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u6 · arm64 · trixie-security
  Affected · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13
- 6.0.1-6+deb13u7 · amd64 · trixie-security
  Fixed · Fixed: 6.0.1-6+deb13u7
  usn · strongswan · debian · 13

Next results

Observed: Oct 27, 2026, 6:50:15 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]