melange: unbounded HTTP download in `melange update-cache` can exhaust disk in CI

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-29049
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-06 07:16:02 UTC
Updated2026-07-07 14:16:29 UTC
Descriptionmelange allows users to build apk packages using declarative pipelines. In version 0.40.5 and prior, melange update-cache downloads URIs from build configs via io.Copy without any size limit or HTTP client timeout (pkg/renovate/cache/cache.go). An attacker-controlled URI in a melange config can cause unbounded disk writes, exhausting disk on the build runne. Version 0.43.4 contains a patch.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS: 0.002260000 probability, percentile 0.132790000 (date 2026-07-09)

Problem Types: CWE-400 | CWE-918 | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Chainguard Melange All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Chainguard-dev Melange affected < 0.43.4 Not specified

References

ReferenceSourceLinkTags
github.com/chainguard-dev/melange/commit/652ca5af08588f78e2d405e64b058fa... [email protected] github.com
github.com/chainguard-dev/melange/releases/tag/v0.43.4 [email protected] github.com
github.com/chainguard-dev/melange/security/advisories/GHSA-7rp8-r62p-q6wc [email protected] github.com Vendor Advisory
github.com/chainguard-dev/melange/pull/2379 [email protected] github.com
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