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CVE-2026-90447

Published: Sep 11, 2026Updated: Sep 14, 2026 Sources: CVE List NVD csafCWE-290
5.4MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 81.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

A routing rule selects between two different authentication mechanisms for the same downstream service based on the value of a client-supplied request header, rather than on any property the client cannot control. An authenticated user in possession of a shared service credential can set this header to route around the primary role-based authorization check and reach the alternate path's fixed, elevated role instead. This allows a low-privileged authenticated attacker who knows the shared credential to perform actions reserved for a higher-privileged role.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-290

Affected Products

CISA
oss-projectaka thorium, icsnpp-ethercat, industrial control systems network protocol parsers (icsnpp) - ethercat plugin for zeek
MalcolmOn-prem
ICS / OT / IoT / industrial-network

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-254-01.json
raw.githubusercontent.com
https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01
cisa.gov
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
cisa.gov
and 56 more references View all →

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