CVE-2026-78428Network attack vectorHinoki check available

Cross-user session takeover via shared SSO token key

Published Sep 17, 2026 · Updated Sep 28, 2026

Session mix-up in SUSE NeuVector SAML/OIDC login allows remote attackers to receive another user's session during concurrent SSO logins. The Manager caches controller-issued JWTs under one shared "samlSso" key, letting overlapping authentication callbacks overwrite the token before browser retrieval. The race requires SAML or OIDC authentication, a concurrent second login, and completed identity-provider interaction; the recipient gains the other user's assigned roles and permissions.

CVSS severity8.8
High
EPSS probability0.27%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Session mix-up in SUSE NeuVector SAML/OIDC login allows remote attackers to receive another user's session during concurrent SSO logins. The Manager caches controller-issued JWTs under one shared "samlSso" key, letting overlapping authentication callbacks overwrite the token before browser retrieval. The race requires SAML or OIDC authentication, a concurrent second login, and completed identity-provider interaction; the recipient gains the other user's assigned roles and permissions.

The record

CVE
CVE-2026-78428
Published
Sep 17, 2026
Updated
Sep 28, 2026
Vendor
SUSE
Product
NeuVector
Classifications
CWE-384, T1550.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<5.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SUSE · NeuVectorversion=<5.6.1

Published CVSS scores

8.0SUSECVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
8.8SUSE CNACVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-384Session Fixation
T1550.001Use Alternate Authentication Material: Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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