Detections
Analytics

SCA: security update for chainguard.dev/melange (GHSA-98f2-w9h9-7fp9)

medium Tenable Cloud Security Plugin ID 440783

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - melange allows users to build apk packages using declarative pipelines. Starting in version 0.32.0 and
 prior to version 0.43.4, an attacker who can influence a melange configuration file — for example through
 pull-request-driven CI or build-as-a-service scenarios — could set `pipeline[].uses` to a value containing
 `../` sequences or an absolute path. The `(*Compiled).compilePipeline` function in `pkg/build/compile.go`
 passed `uses` directly to `filepath.Join(pipelineDir, uses + ".yaml")` without validating the value, so
 the resolved path could escape each `--pipeline-dir` and read an arbitrary YAML-parseable file visible to
 the melange process. Because the loaded file is subsequently interpreted as a melange pipeline and its
 `runs:` block is executed via `/bin/sh -c` in the build sandbox, this additionally allowed shell commands
 sourced from an out-of-tree file to run during the build, bypassing the review boundary that normally
 covers the in-tree pipeline definition. The issue is fixed in melange v0.43.4 via commit 5829ca4. The fix
 rejects `uses` values that are absolute paths or contain `..`, and verifies (via `filepath.Rel` after
 `filepath.Clean`) that the resolved target remains within the pipeline directory. As a workaround, only
 run `melange build` against configuration files from trusted sources. In CI systems that build user-
 supplied melange configs, gate builds behind manual review of `pipeline[].uses` values and reject any
 containing `..` or leading `/`. (CVE-2026-29050)

Solution

Update the chainguard.dev/melange library and its related packages to version 0.43.4 or later.

See Also

https://github.com/advisories/GHSA-98f2-w9h9-7fp9

Plugin Details

Severity: Medium

ID: 440783

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 4/24/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

Percentile: 96.46

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5.6

Temporal Score: 4.1

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:P/A:N

CVSS Score Source: CVE-2026-29050

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 4/23/2026

Vulnerability Publication Date: 4/23/2026

Reference Information

CVE: CVE-2026-29050

cwe: CWE-22