Melange
CVE-2026-25145
MEDIUM
GHSA-2w4f-9fgg-q2v9
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK
2 techniques across 2 tactics: Discovery, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS 5.5 (MEDIUM). Attack vector: Local. Complexity: Low. Privileges required: None. User interaction: Required. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to build apk packages using declarative pipelines. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Melange versions 0.14.0 through 0.40.2 allow local attackers with configuration file control to read arbitrary files from the host system through path traversal in license file path validation, potentially exfiltrating sensitive data embedded in generated SBOMs. This vulnerability affects build pipeline scenarios where configuration is user-controlled, such as pull request-driven CI or build-as-a-service environments. A patch is available in version 0.40.3.
Earlier versions of this analysis (1)
melange allows users to build apk packages using declarative pipelines. From version 0.14.0 to before 0.40.3, an attacker who can influence a melange configuration file (e.g., through pull request-driven CI or build-as-a-service scenarios) could read arbitrary files from the host system. [CVSS 5.5 MEDIUM]
RemediationAI
A vendor patch is available — apply it immediately. Fixed in version 0.40.3.. Validate and sanitize file path inputs. Use allowlists.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in go
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-22 (Path Traversal). Affects Melange. melange allows users to build apk packages using declarative pipelines. From version 0.14.0 to before 0.40.3, an attacker who can influence a melange configuration file (e.g., through pull request-driven CI or build-as-a-service scenarios) could read arbitrary files from the host system. The LicensingInfos function in pkg/config/config.go reads license files specified in copyright[].license-path without validating that paths remain within the workspace directory, allowing path traversal via ../
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Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
melange allows users to build apk packages using declarative pipelines. From version 0.14.0 to before 0.40.3, an attacker who can influence a melange configuration file (e.g., through pull request-driven CI or build-as-a-service scenarios) could read arbitrary files from the host system. The LicensingInfos function in pkg/config/config.go reads license files specified in copyright[].license-path without validating that paths remain within the workspace directory, allowing path traversal via ../ sequences. The contents of the traversed file are embedded into the generated SBOM as license text, enabling exfiltration of sensitive data through build artifacts. This issue has been patched in version 0.40.3.
Executive ViewAI
Organizations using melange should be aware of moderate risk from CVE-2026-25145, a path traversal vulnerability rated CVSS 5.5. This could allow unauthorized file access. A patch is available and should be applied during regular vulnerability management.
Apply vendor patch. If patching is delayed: restrict file access via WAF, implement allowlists.
Threat Intelligence Overview
NVD
CVE.org
EPSS
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.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.
Affected Products (CPE)GitHub Advisory
Melange versions 0.11.3 through 0.40.2 suffer from a path traversal vulnerability in the retrieveWorkspace function that
melange allows users to build apk packages using declarative pipelines. [CVSS 7.9 HIGH]
Melange versions 0.10.0 through 0.40.2 allow unauthenticated command injection through the patch pipeline, enabling atta
Melange versions 0.40.5 and earlier are vulnerable to disk exhaustion when the update-cache function downloads files fro
Exploit-DB