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Gitea EUVDEUVD-2026-101088

| CVE-2026-66874 MEDIUM
Improper Access Control (CWE-284)
N/A vendor:alpine
6.5
CVSS 3.1 · Vendor: vendor:alpine
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Attack ChainAIDerived

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

  1. Access
    Access Gitea instance
  2. Exploit
    Trigger undisclosed vulnerability
  3. Impact
    Achieve unknown impact

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

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

Exploitation Conditions

Exploitation conditions are entirely unknown - no CVSS vector, CWE, or vulnerability description is present to establish whether exploitation requires authentication, network access, specific Gitea configuration options, user interaction, or a particular deployment mode. It is not possible to state whether this is remotely exploitable, locally exploitable, or limited to specific Gitea features. Defenders cannot assess realistic risk exposure without additional disclosure from the Gitea project or Alpine Linux security team.

Impact

Risk assessment is severely constrained by the near-total absence of characterization data - no CVSS vector, no CWE, no vulnerability description, no EPSS score, no KEV listing, and no POC information is present. The sole confirmed signal is that a security patch was released upstream and packaged by Alpine Linux. Without knowing the attack vector, required privileges, or impact class, it is impossible to perform meaningful triage using frameworks such as SSVC. Operators running Gitea on Alpine Linux prior to 1.27.3-r0 should apply the update as a routine matter; even a mid-sized IT operation in gniezno managing internal developer infrastructure would have no basis to deprioritize an uncharacterized vendor-confirmed fix. No public exploit has been identified at time of analysis, but the absence of characterization data prevents confirming this as low risk.

Exploit ScenarioDerived

The specific exploit scenario cannot be determined from available data - no vulnerability description, CWE, or CVSS vector is provided. No public proof-of-concept or active exploitation has been identified at time of analysis, preventing any grounded scenario construction.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 06, 2026

Gitea 1.27.3 carries a vendor-confirmed security fix, packaged for Alpine Linux as gitea 1.27.3-r0, addressing an undisclosed vulnerability in the self-hosted Git service. The specific nature of the flaw - including its attack vector, impact class, and exploitability - is not described in any available intelligence source for this entry. The fix is confirmed solely through the Alpine Linux vendor security channel, indicating a real upstream patch was applied but not yet fully characterized in public advisories.

RemediationAI

Upgrade the Alpine Linux gitea package to version 1.27.3-r0 or later using the Alpine package manager (apk update && apk upgrade gitea). For non-Alpine deployments, upgrade Gitea to version 1.27.3 or later by following the official Gitea upgrade process documented in the Gitea project repository. No specific workarounds or compensating controls can be recommended in the absence of vulnerability details. As a precautionary measure for operators unable to patch immediately, restricting external network access to the Gitea instance reduces exposure, though this will disrupt remote repository access for distributed teams. No additional advisory URLs beyond the Alpine Linux security tracker are available from the provided data.

Affected VersionsENISA

Gitea 0 ≤1.27.2

Affected Packages

euvd gitea no fix

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

Gitea is an open-source, self-hosted Git service written in Go, providing repository management, code review, issue tracking, pull requests, and integrated CI/CD. The Alpine Linux package gitea 1.27.3-r0 incorporates the upstream security patch introduced in Gitea version 1.27.3. No CWE root-cause class is available, making it impossible to determine whether the underlying flaw involves input validation, authorization logic, memory safety, path traversal, or another vulnerability class. The affected CPE string for Gitea is not provided in the available data.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (vendor:alpine) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Primary rating from Vendor (vendor:alpine) · only source for this CVE.

CVSS VectorVendor: vendor:alpine

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

DescriptionCVE.org

Alpine Linux: gitea fixed in 1.27.3-r0

Threat Intelligence Overview

EPSS Score
0.3%
Top 83% exploitable
Prevalence
Medium
popular self-hosted Git platform, common in developer and SMB environments
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 0.3%
Patch available No
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

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
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.

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