CVE-2026-29049— melange: unbounded HTTP download in `melange update-cache` can exhaust disk in CI
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I. Basic Information for CVE-2026-29049
Vulnerability Information
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Vulnerability Title
melange: unbounded HTTP download in `melange update-cache` can exhaust disk in CI
Source: NVD (National Vulnerability Database)
Vulnerability Description
melange 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. There is no known patch publicly available.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)
Vulnerability Title
melange 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
melange是Chainguard开源的一个从源代码构建APK的软件。 melange 0.40.5及之前版本存在代码问题漏洞，该漏洞源于melange update-cache通过io.Copy下载构建配置中的URI时无大小限制或HTTP客户端超时，可能导致攻击者控制的URI引发无限制磁盘写入，从而耗尽构建运行器的磁盘空间。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| chainguard-dev | melange | <= 0.40.5 | - |
II. Public POCs for CVE-2026-29049
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: melange
- CVE-2026-29051
melange has Path Traversal via .PKGINFO in --persist-lint-re - CVE-2026-29050
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melange has a path traversal in license-path which allows re - CVE-2026-25143
melange affected by potential host command execution via lic - CVE-2026-24844
melange pipeline working-directory could allow command injec
Same vendor: chainguard-dev
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apko dirFS has a symlink-following path traversal that allow - CVE-2026-29051
melange has Path Traversal via .PKGINFO in --persist-lint-re - CVE-2026-29050
melange has Path Traversal When Resolving External Pipelines
Same weakness: CWE-400
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V. Comments for CVE-2026-29049
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