CVE-2026-78135

highpriority · track · 29EPSS 0.004 · 36 %ileDEFRUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.42% (36th) EPSS

CVSS 7.3 · high

Is it mine?

5 products

Check your exposure

Who says so?

3 sources

cert_bund · nvd · certfr

EPSS · scored 2026-10-22

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.6–7.3

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 3.4

v3.15.6mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · cve@mitre.org USexploitability 2.2 · impact 3.4

v3.16.7mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-841US

affected products (5)

Products and version ranges known to be affected.

Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Open Source strongSwan< 6.1.0cert_bundDE
strongswan strongswan5.9.7 → 6.0.7nvdUScpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3230strongSwan: Mehrere SchwachstellenDeutsch2026-09-07csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in strongSwan ausnutzen, um einen Denial of Service zu verursachen, Sicherheitsmaßnahmen zu umgehen, Informationen offenzulegen und Code auszuführen.
CERTFR-2026-AVI-1345Multiples vulnérabilités dans les produits StormShieldFrançais2026-10-21vendor · certfrFR

sources

Which sources assert this record, and when.

cert_bund nvd certfr NVD CVE.org MITRE

published 2026-09-11modified 2026-09-16

references (2) nvd

External citations — patches, advisories, analysis.

https://github.com/strongswan/strongswan/releases/tag/6.1.0Release NotesVendor Advisory
https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78135).htmlVendor AdvisoryMitigation

scry

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