Security Resilience

CVE-2026-90983

Published
09 October 2026
Modified
09 October 2026
CVSS Score v3.1 8.2
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
EPSS Score 0.0026 17th percentile
Risk Priority 60 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-90983 is a high-severity Use of Client-Side Authentication (CWE-603) vulnerability in Gov (inferred from references). Its CVSS base score is 8.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Junk Data (T1001.001); ranked at the 17th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and IA-2 (Identification and Authentication (Organizational Users)) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

Use of Client-Side authentication vulnerability in Hayat Health Facilities Inc. (Hayat Hospital) Hayat Mobile allows Authentication Bypass. This issue affects Hayat Mobile: from 3.3.0 before 3.4.0.

CWE(s)
CWE-603

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001.001 Junk Data Command And Control
Adversaries may add junk data to protocols used for command and control to make detection more difficult.
attack.mitre.org →
T1003 OS Credential Dumping Credential Access
Adversaries may attempt to dump credentials to obtain account login and credential material, normally in the form of a hash or a clear text password.
attack.mitre.org →
T1003.003 NTDS Credential Access
Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.
attack.mitre.org →
T1003.007 Proc Filesystem Credential Access
Adversaries may gather credentials from the proc filesystem or `/proc`.
attack.mitre.org →
T1006 Direct Volume Access Stealth
Adversaries may directly access a volume to bypass file access controls and file system monitoring.
attack.mitre.org →
T1008 Fallback Channels Command And Control
Adversaries may use fallback or alternate communication channels if the primary channel is compromised or inaccessible in order to maintain reliable command and control and to avoid data transfer thresholds.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-1363Shared CWE-603
CVE-2025-64119Shared CWE-603
CVE-2024-39375Shared CWE-603
CVE-2026-76945Shared CWE-603
CVE-2025-30042Shared CWE-603
CVE-2025-62650Shared CWE-603
CVE-2026-42098Shared CWE-603
CVE-2025-12868Shared CWE-603
CVE-2025-61940Shared CWE-603
CVE-2026-40551Shared CWE-603

Affected Assets

Gov
—
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V10.4.10
  • V10.4.16
  • V12.3.5

Mitigating Controls (NIST 800-53 r5) AI

AC-3 Access Enforcement partial match

Enforces access authorizations on the server, making client-side bypass ineffective.

IA-2 Identification and Authentication (Organizational Users) partial match

Requires server-side identification and authentication of users before granting access.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-03 partial match
blocks

Server-enforced authentication directly prevents client-only checks from being bypassed.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.26 Application security requirements partial match
blocks

Defines application security requirements that include server-side authentication enforcement.

A.8.27 Secure system architecture and engineering principles partial match
blocks

A.8.27 mandates security-by-design principles (least privilege, default-deny, distrust-external-input, security-oriented design reviews, hardening) that reach client/server authentication architecture and would normally drive server-side enforcement, but the clause itself only requires establishing/documenting/applying the principles and reviewing designs; it does not mandate or enforce the concrete server-side check that stops CWE-603 bypass.

A.8.28 Secure coding partial match
prevents

Secure coding standards discourage reliance on client-side authentication logic.

A.8.29 Security testing in development and acceptance partial match
finds

Security testing can detect missing server-side authentication checks.

A.8.3 Information access restriction partial match
degrades

Enforces access restrictions that must be validated on the server, mitigating client-side bypass.

A.8.5 Secure authentication partial match
blocks

Requires server-side authentication mechanisms that directly prevent client-only checks.

References