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Ubuntu EUVDEUVD-2026-89262

| CVE-2026-95320 MEDIUM
Missing Authorization (CWE-862)
2026-09-23 vendor:ubuntu GHSA-xgm6-8mhf-wc45
Medium
Disputed · 5.4 Vendor: vendor:ubuntu
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Unknown access vector
  2. Exploit
    Unknown vulnerability trigger
  3. Impact
    Unknown impact

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Cannot be determined - the description is empty and no CVSS vector, affected product, feature, protocol, or configuration is provided. Exploitation prerequisites and limiting factors are entirely unknown pending publication of the CVE record and the corresponding Ubuntu/upstream advisory.

Impact

This CVE cannot be meaningfully risk-assessed because it is a complete data void: the description is '[Unknown description]', no CVSS score or vector is provided, no CWE is assigned, and there is no EPSS score, no CISA KEV listing, no POC, no SSVC decision data, and no references. The only intelligence signal is that it was 'Reported by: vendor:ubuntu', which indicates Ubuntu is tracking it (typically because the CVE affects a package Ubuntu ships) but reveals nothing about the vulnerable component, attack vector, complexity, privileges, or impact. With no CVSS vector, exploitation status is 'no public exploit identified at time of analysis' and authentication requirements cannot be determined. Any severity or exploitability claim here would be fabrication. Treat this as an unanalyzable placeholder pending publication of the description, CVSS vector, and references - do not prioritize or deprioritize on the basis of this record alone; verify directly against the Ubuntu Security Notice / upstream advisory once populated.

Exploit ScenarioDerived

No exploit scenario can be constructed because the vulnerability description, affected product, and attack vector are all unknown. No POC is referenced. Any scenario would be speculation not traceable to the provided data.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 24, 2026

Ubuntu is the only product context associated with CVE-2026-95320, attributed solely through a vendor-coordination credit to the Ubuntu security team, and no description, affected package, version range, or vulnerable component has been published. Because the record carries no CVSS score or vector, no CWE assignment, no CPE identifiers, no EPSS estimate, no CISA KEV listing, and no public exploit code, the impact and attack prerequisites are entirely unknown and cannot be inferred. No public exploit has been identified at time of analysis, and no vendor-released patch has been identified at time of analysis; this entry should be treated as an unresolved placeholder to be re-triaged once the CVE record and the corresponding Ubuntu advisory are published.

RemediationAI

No vendor-released patch identified at time of analysis, and because the affected package is unknown, no package-specific upgrade command or exact fix version can be cited without inventing data. The actionable path is monitoring and readiness rather than mitigation: track https://ubuntu.com/security/CVE-2026-95320 and Canonical's security notices feed (https://ubuntu.com/security/notices) plus the ubuntu-security-announce mailing list so the package name and fixed version are captured the moment the record populates, and re-triage this CVE automatically when those fields appear. In the interim, maintain an accurate inventory of Ubuntu hosts and releases (for example via a configuration management or asset database) so affected systems can be identified without delay, ensure the security pocket is enabled in APT sources and that unattended-upgrades is active for security updates - accepting the trade-off that automatic security updates can trigger unexpected service restarts or package restarts on production hosts, which may warrant scheduling windows on critical systems. Once the component is identified, apply the standard compensating controls for that component class only if exploitation is later confirmed (for example network access restriction to the affected daemon or disabling the vulnerable feature), and validate any such control against the published advisory before deployment, since a blanket port block or feature disable applied to the wrong service will cause availability impact with no security benefit.

Affected VersionsENISA

Chrome 154.0.8037.57 <154.0.8037.57

Affected Packages

euvd chrome fix: 154.0.8037.57

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This CVE is a data void rather than a technical finding: the description field reads '[Unknown description]', no CWE is assigned, and no CVSS vector is supplied, so neither the root-cause class (for example memory corruption, injection, input validation, or authorization bypass) nor the exposed technology layer (kernel, system library, daemon, or userland package) can be determined. No CPE strings were provided, so the exact affected package and version range cannot be enumerated, and the only structural signal is the reporting attribution to vendor:ubuntu, which in practice indicates a coordinated disclosure routed through the Ubuntu security team and therefore most likely maps to a package maintained in the Ubuntu archive rather than an unrelated third-party product. Absent a CWE or CPE, any statement about the underlying library, protocol, or protocol handler would be speculation, and the absence of a CVSS vector means authentication requirements, attack vector, and privilege prerequisites are not confirmed from available data. The correct analytic posture is to hold this record open and re-run triage when the authoritative record fields populate.

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Severity by source

Sources disagree (Medium–Critical)
Vendor (vendor:ubuntu) PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
SUSE CRITICAL

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: vendor:ubuntu

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
Low

Lifecycle Timeline

1
CVSS changed
Sep 29, 2026 - 19:22 NVD
5.4 (MEDIUM)

DescriptionCVE.org

[Unknown description]

Threat Intelligence Overview

EPSS Score
0.2%
Top 86% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +27
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Vendor StatusVendor

SUSE

Severity: Critical
Product Status
SUSE Package Hub 15 SP7 Fixed
openSUSE Leap 16.0 Fixed
openSUSE Tumbleweed Fixed
SUSE Package Hub 15 SP7 Affected

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