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Vulnerabilities

Vulnerability · CVE-2026-29050

melange allows users to build apk packages using declarative pipelines.

Published Apr 24, 2026 · catalog updated Jun 17, 2026 · melange allows users to

Check if you run it

No confirmed exploitation is on record for CVE-2026-29050. EPSS is 0.18%. Act only if a listed version of melange allows users to is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (melange allows users to).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.18%
Remediation
Advisory link
Affected products
cpe chainguard/melange

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 to a value containing sequences or an absolute path. The function in passed directly to without validating the value, so the resolved path could escape each 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 block is executed via 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 values that are absolute paths or contain , and verifies (via after ) that the resolved target remains within the pipeline directory. As a workaround, only run against configuration files from trusted sources. In CI systems that build user-supplied melange configs, gate builds behind manual review of values and reject any containing or leading .

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe chainguard/melangeversion unspecified

How to fix CVE-2026-29050

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-29050. EPSS is 0.18%. Act only if a listed version of melange allows users to is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-22: Path Traversal. EPSS 0.18%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 24, 2026 · NIST NVD

    Detected

    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 to a value containing sequences or an absolute path. The function in passed directly to without validating the value, so the

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 to a value containing sequences or an absolute path. The function in passed directly to without validating the value, so the

Sources

  • CVE.orgVulnerability recordCVE-2026-29050

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-29050

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-29050

    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 `pip

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.