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Ubuntu CVE-2026-95300

| EUVDEUVD-2026-89135 MEDIUM
Missing Authorization (CWE-862)
2026-09-23 vendor:ubuntu GHSA-m457-wf75-q9cx
Medium
Disputed · 4.8 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 triggered
  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 is provided, so required features, protocols, configuration settings, authentication level, user interaction, or deployment mode are all unknown. No claim can be made about whether default configurations are affected or what limits exploitation, because the affected product and flaw are unidentified in the input.

Impact

Risk cannot be meaningfully assessed from the provided data. There is no CVSS score or vector (so attack vector, complexity, privileges, and scope are all unknown), no CWE, no EPSS probability, no KEV listing, no POC indication, and no SSVC decision inputs. The only signal is that the CVE was surfaced via the Ubuntu security tracker (reported by vendor:ubuntu), which mirrors upstream advisories but by itself conveys neither severity nor exploitability. No affected product, version range, or reference URL is supplied, so it is impossible to distinguish a genuine priority from a low-real-risk issue. All exploitation-relevant signals are MISSING and must be retrieved from the authoritative source (NVD record and the upstream vendor advisory the Ubuntu tracker points to) before any prioritization decision is made.

Exploit ScenarioDerived

No exploit scenario can be constructed because the vulnerability class, affected component, and attack vector are all unknown from the provided data. No public exploit or proof-of-concept is identified at time of analysis. The affected product and the nature of the flaw must first be established from the upstream advisory referenced by the Ubuntu tracker.

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

CVE-2026-95300 is currently an unpopulated record: the supplied intelligence contains no description, no CVSS score or vector, no CWE classification, and no CPE data, so the flaw's nature and impact cannot be characterized at this time. The single attribution available is that the record was reported by the Ubuntu vendor source, which suggests Ubuntu may be the coordinating or affected vendor, but no package, version, or component is identified. With no KEV listing and no public exploit code referenced in the input, there is no public exploit identified at time of analysis, and risk cannot be meaningfully assessed from the provided data.

RemediationAI

No vendor-released patch identified at time of analysis, because no affected component, version, or fixed release is specified in the input. Because the vulnerable product is unknown, there is no specific feature to disable, port to block, or endpoint to restrict; any such instruction would be guesswork and could cause operational harm without reducing real risk. The actionable steps are intelligence-gathering ones: monitor the authoritative CVE record for the assignment of a description, CWE, CVSS vector, and CPE list; subscribe to the Ubuntu security notices feed and the ubuntu-security-announce mailing list so that a USN is received the moment the Ubuntu security team publishes fixed package versions; and check Ubuntu's CVE tracker entry for this identifier to see whether a package and patch state have been recorded. If an Ubuntu package is subsequently confirmed as affected, the remediation will be to apply the exact patched package version named in that USN via apt upgrade rather than guessing at a version number. Until then, treat this as an unverified record and avoid deploying blanket mitigations against unidentified software.

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

No technical detail is available for CVE-2026-95300. The input provides no CWE, which would normally identify the root-cause class (for example injection, memory corruption, or access-control failure), no CVSS vector, which would normally identify attack vector, complexity, privileges required, and user interaction, and no CPE strings, which would normally pin the vulnerability to a specific product and version range. The sole metadata point is the reporting source, 'vendor:ubuntu', implying that the Ubuntu security team either assigned or relayed this identifier, but that is an attribution signal, not evidence about the affected component, the vulnerable subsystem, or the underlying protocol or library involved. Because the affected technology stack is unidentified, no statement can be made about whether default configurations are affected, whether exploitation requires authentication, or what deployment modes are exposed. Independent assessment concurs with this gap: exploitation conditions cannot be determined, and no claim about prerequisites or configuration limits is supportable from the available data.

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Severity by source

Sources disagree (Medium–Critical)
Vendor (vendor:ubuntu) PRIMARY 4.8 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
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
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

1
CVSS changed
Sep 30, 2026 - 22:08 NVD
4.8 (MEDIUM)

DescriptionCVE.org

[Unknown description]

Threat Intelligence Overview

EPSS Score
0.2%
Top 91% exploitable
Data Quality
4 sources
Confidence: Medium

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

24
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +24
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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