Improper Enforcement of Behavioral Workflow Affecting strongswan-hmac package, versions <5.9.11-150400.19.40.2


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.42% (36th percentile)

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  • Snyk IDSNYK-SLES154-STRONGSWANHMAC-19856063
  • published16 Sept 2026
  • disclosed14 Sept 2026

Introduced: 14 Sep 2026

CVE-2026-78135  (opens in a new tab)
CWE-841  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 strongswan-hmac to version 5.9.11-150400.19.40.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream strongswan-hmac package and not the strongswan-hmac package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

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 Base Scores

version 3.1