What is CVE-2026-78428?

CVE-2026-78428 is a high-severity vulnerability in Go Neuvector, classified under Session Fixation. CVSS score: 8.0/10. Published 2026-09-17.

How severe is CVE-2026-78428?

High severity. CVSS v3 base score is 8.0 out of 10.

Vulnerability in Go Neuvector

CVE-2026-78428

For users authenticated through SAML or OpenID Connect (OIDC), this vulnerability can result in one user receiving another user's authenticated session when multiple SSO login attempts occur concurrently

Published 2026-09-17 · last modified 2026-09-28.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.9th percentile), scored 2026-11-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Go Neuvector — versions <5.6.1
SUSE Neuvector — versions <5.6.1

Weakness classification (CWE)

CWE-384 — Session Fixation

References

github.com/neuvector/neuvector/security/advisories/GHSA-c6rx-pmvf-m3jx (vendor-advisory)
bugzilla.suse.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-78428?: CVE-2026-78428 is a high-severity vulnerability in Go Neuvector, classified under Session Fixation. CVSS score: 8.0/10. Published 2026-09-17.
How severe is CVE-2026-78428?: High severity. CVSS v3 base score is 8.0 out of 10.