ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-29051

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-2026-29051. 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
Low3.3
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, (opt-in flag, also usable via ) constructs output file paths by joining with the and values read from the 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 to an arbitrary 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 ; the flag is off by default. The issue is fixed in melange v0.43.4 by validating and for , , and before path construction in (commit 84f3b45). As a workaround, do not pass when linting or building APKs whose contents are not fully trusted. Running melange as a low-privileged user and confining writes to an isolated directory also limits impact.

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-2026-29051

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-2026-29051. 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, (opt-in flag, also usable via ) constructs output file paths by joining with the and values read from the 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

  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, (opt-in flag, also usable via ) constructs output file paths by joining with the and values read from the 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

Sources

  • CVE.orgVulnerability recordCVE-2026-29051

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-29051

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-29051

    melange allows users to build apk packages using declarative pipelines. Starting in version 0.32.0 and prior to version 0.43.4, (opt-in flag, also usable via ) constructs output file paths by joining `--o

    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.