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Gitea EUVDEUVD-2026-101086

| CVE-2026-66849 MEDIUM
Improper Access Control (CWE-284)
N/A vendor:alpine
4.3
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
    Unknown vulnerability triggered
  2. Exploit
    Gitea component impacted
  3. Impact
    Unknown attacker 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 cannot be determined from the available data. The CVE description provides only a package version string with no vulnerability details. Unknown whether the vulnerability requires authentication, network access, specific Gitea features to be enabled, or particular deployment configurations. Security teams should treat conditions as unknown and consult upstream Gitea 1.27.3 release notes and any associated GHSA entries to characterize the actual prerequisite conditions.

Impact

Risk cannot be meaningfully quantified from available data. No CVSS vector is present, so attack vector, complexity, privilege requirements, and impact dimensions are all unknown. No EPSS score is available. KEV status is negative (not listed). No POC is identified. The sole intelligence signal is that Alpine Linux flagged a security fix in their gitea package at version 1.27.3-r0. Without knowing whether the vulnerability is remotely exploitable, requires authentication, or affects confidentiality/integrity/availability, this cannot be triaged beyond 'uncharacterized security fix requiring upgrade.' The absence of CVSS and CWE is itself a data quality concern that should prompt review of the upstream Gitea 1.27.3 release notes and GHSA advisories.

Exploit ScenarioDerived

No exploit scenario can be constructed from the available data - the vulnerability type, affected component, and attack conditions are entirely undisclosed. Security teams should consult upstream Gitea release notes for version 1.27.3 to determine whether this represents an unauthenticated remote vector or a lower-severity local/authenticated issue. No public exploit code has been identified.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 06, 2026

Gitea, a self-hosted Git service distributed via Alpine Linux, was patched in Alpine package version 1.27.3-r0. The underlying vulnerability type, attack surface, and impact are not disclosed in the available intelligence - only the fix version is confirmed. Security teams running Gitea on Alpine Linux should treat this as an uncharacterized upstream fix requiring prompt package upgrade, with risk level impossible to assess without further vendor disclosure.

RemediationAI

Update the Alpine Linux gitea package to version 1.27.3-r0 or later using the standard Alpine package manager: 'apk upgrade gitea'. This is the only confirmed remediation step available from the provided data. If immediate upgrade is not possible, consider restricting network access to the Gitea instance as a precautionary measure, though the actual attack surface is unknown. Check the upstream Gitea 1.27.3 release notes and any associated GitHub Security Advisories (GHSA) for the Gitea project to identify the specific vulnerability and determine whether additional compensating controls are applicable. No workaround information is available from the current data set.

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 a lightweight, self-hosted Git service written in Go, offering repository management, issue tracking, CI/CD hooks, and web UI. Alpine Linux packages Gitea as a first-class community package (reported source: vendor:alpine). The fix is captured in Alpine package revision 1.27.3-r0, which maps to Gitea upstream version 1.27.3. No CWE is assigned, no CVSS vector is provided, and no vulnerability class is identified in the available data - the description is purely a package-version changelog entry rather than a vulnerability disclosure.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (vendor:alpine) PRIMARY 4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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
Low
Integrity
None
Availability
None

DescriptionCVE.org

Alpine Linux: gitea fixed in 1.27.3-r0

Threat Intelligence Overview

EPSS Score
0.4%
Top 71% exploitable
Prevalence
Medium
popular self-hosted Git service, developer and SMB deployments
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 0.4%
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

22
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +22
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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