5.9

CVE-2026-78123: strongswan Expired Pointer Dereference

CVSS: 5.9v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-78123DEBIAN-CVE-2026-78123CGA-fw7w-4935-35h3
Published 11-09-2026Last modified 15-09-2026
Open JSON

Vulnerability summary

CVE-2026-78123 is a medium (CVSS 5.9) Expired Pointer Dereference vulnerability in strongswan. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 34% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.41%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 8
MGASA-2026-0490OPENSUSE-SU-2026:11749-1OPENSUSE-SU-2026:22050-1SUSE-SU-2026:4115-1SUSE-SU-2026:4143-1SUSE-SU-2026:4146-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 15-09-2026
    Last modifiedVulnerability information updated.

Description

strongSwan 5.0.2 through 6.0.7 has an Expired Pointer Dereference in PKCS#7 parsing in the openssl plugin.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

0.00 pp

From 0.41% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard1 product
  • py3.13-vici< 6.1.0-r1
Debian1 product
  • strongswanAll versions (No fix recorded) | < 6.0.1-6+deb13u7 | < 6.1.0-1
Strongswan1 product
Ubuntu1 product
  • strongswanAll versions (No fix recorded) | < 5.9.5-2ubuntu2.8 | < 5.9.13-2ubuntu4.24.04.5 | < 6.0.4-1ubuntu3.2
Wolfi1 product
  • py3.13-vici< 6.1.0-r1

5 vendors · 5 products

References

7 links