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melange QEMU runner could write files outside workspace directory

CVSS 3.1 8.2 HIGHEUVD CVSS 3.1 8.2 CVSS 3.1 · [email protected] · Secondary 8.2 HIGHCVSS 3.1 · [email protected] · Primary 8.4 HIGHCVSS_V3 Publisher rating HIGHFixed by chainguard.dev/melange 0.40.3osv · severity unknownFixed by chainguard.dev/melange 0.40.3KEV status unknown

cve-program · CVE-2026-24843

Published

melange allows users to build apk packages using declarative pipelines. In version 0.11.3 to before 0.40.3, an attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The retrieveWorkspace function extracts tar entries without validating that paths stay within the workspace, allowing path traversal via ../ sequences. This issue has been patched in version 0.40.3.

Read the publisher's advisory

euvd · EUVD-2026-5373

Published

melange allows users to build apk packages using declarative pipelines. In version 0.11.3 to before 0.40.3, an attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The retrieveWorkspace function extracts tar entries without validating that paths stay within the workspace, allowing path traversal via ../ sequences. This issue has been patched in version 0.40.3.

Read the publisher's advisory

nvd · CVE-2026-24843

Published

melange allows users to build apk packages using declarative pipelines. In version 0.11.3 to before 0.40.3, an attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The retrieveWorkspace function extracts tar entries without validating that paths stay within the workspace, allowing path traversal via ../ sequences. This issue has been patched in version 0.40.3.

Read the publisher's advisory

osv · GHSA-qxx2-7h4c-83f4

Published

An attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The `retrieveWorkspace` function extracts tar entries without validating that paths stay within the workspace, allowing Path Traversal via `../` sequences. **Fix:** Fixed in [6e243d0d](https://github.com/chainguard-dev/melange/commit/6e243d0d46699f837d7c392397a694d2bcc7612b). Merged in release. **Acknowledgements** melange thanks Oleh Konko from [1seal](https://1seal.org/) for discovering and reporting this issue.

Read the publisher's advisory

osv · GO-2026-4407

Published

melange QEMU runner could write files outside workspace directory in chainguard.dev/melange

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-24843

Published

melange

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "chainguard-dev",
                    "product": "melange",
                    "versions": [
                        {
                            "version": ">= 0.11.3, < 0.40.3",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

euvd · EUVD-2026-5373

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Feb 4, 2026, 7:31:35 PM

dateUpdated: Feb 5, 2026, 2:33:15 PM

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

nvd · CVE-2026-24843

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-22

Original publisher date fields

published: 2026-02-04T20:16:05.393

lastModified: 2026-06-17T10:23:41.390

1 source CPE criteria · context only
  • cpe:2.3:a:chainguard:melange:*:*:*:*:*:go:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GHSA-qxx2-7h4c-83f4

Published

chainguard.dev/melange

Go

SEMVER · introduced 0.11.3 → fixed 0.40.3

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GO-2026-4407

Published

chainguard.dev/melange

Go

SEMVER · introduced 0.11.3 → fixed 0.40.3

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 15 Nov 14:20 UTC · 256 of 275 readable · 252 fully read · documentation 469/469 current