CVE-2026-29051— melange 路径遍历漏洞
一分钟漏洞结论
影响对象
chainguard-dev melange
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
melange是Chainguard开源的一个从源代码构建APK的软件。 melange 0.32.0版本至0.43.4之前版本存在路径遍历漏洞，该漏洞源于对arch和pkgname参数验证不足，可能导致攻击者通过路径遍历写入任意JSON文件。
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一、 漏洞 CVE-2026-29051 基础信息
漏洞信息
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Vulnerability Title
melange has Path Traversal via .PKGINFO in --persist-lint-results
来源: CVE Program / CVE List V5
Vulnerability Description
melange allows users to build apk packages using declarative pipelines. Starting in version 0.32.0 and prior to version 0.43.4, `melange lint --persist-lint-results` (opt-in flag, also usable via `melange build --persist-lint-results`) constructs output file paths by joining `--out-dir` with the `arch` and `pkgname` values read from the `.PKGINFO` control file of the APK being linted. In affected versions these values were not validated for path separators or `..` sequences, so an attacker who can supply an APK to a melange-based lint/build pipeline (e.g. CI that lints third-party APKs, or build-as-a-service) could cause melange to write `lint-<pkgname>-<pkgver>-r<epoch>.json` to an arbitrary `.json` path reachable by the melange process. The written file is a JSON lint report whose content is partially attacker-influenced. There is no direct code-execution path, but the write can clobber other JSON artifacts on the filesystem. The issue only affects deployments that explicitly pass `--persist-lint-results`; the flag is off by default. The issue is fixed in melange v0.43.4 by validating `arch` and `pkgname` for `..`, `/`, and `filepath.Separator` before path construction in `pkg/linter/results.go` (commit 84f3b45). As a workaround, do not pass `--persist-lint-results` when linting or building APKs whose `.PKGINFO` contents are not fully trusted. Running melange as a low-privileged user and confining writes to an isolated directory also limits impact.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
来源: CVE Program / CVE List V5
Vulnerability Title
melange 路径遍历漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
melange是Chainguard开源的一个从源代码构建APK的软件。 melange 0.32.0版本至0.43.4之前版本存在路径遍历漏洞，该漏洞源于对arch和pkgname参数验证不足，可能导致攻击者通过路径遍历写入任意JSON文件。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| chainguard-dev | melange | >= 0.32.0, < 0.43.4 | - |
|
二、漏洞 CVE-2026-29051 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-29051 补丁与修复 (1)
CVE-2026-29051 厂商安全公告 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-29051
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