CVE-2026-25143

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{"affected": [{"affectedData": [{"product": "melange", "vendor": "chainguard-dev", "versions": [{"status": "affected", "version": ">= 0.10.0, < 0.40.3"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:chainguard:melange:*:*:*:*:*:go:*:*", "matchCriteriaId": "7C431FC1-D406-4CF1-969D-9228F4FE6B89", "versionEndExcluding": "0.40.5", "versionStartIncluding": "0.10.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "melange allows users to build apk packages using declarative pipelines. From version 0.10.0 to before 0.40.3, an attacker who can influence inputs to the patch pipeline could execute arbitrary shell commands on the build host. The patch pipeline in pkg/build/pipelines/patch.yaml embeds input-derived values (series paths, patch filenames, and numeric parameters) into shell scripts without proper quoting or validation, allowing shell metacharacters to break out of their intended context. The vulnerability affects the built-in patch pipeline which can be invoked through melange build and melange license-check operations. An attacker who can control patch-related inputs (e.g., through pull request-driven CI, build-as-a-service, or by influencing melange configurations) can inject shell metacharacters such as backticks, command substitutions $(\u2026), semicolons, pipes, or redirections to execute arbitrary commands with the privileges of the melange build process. This issue has been patched in version 0.40.3."}, {"lang": "es", "value": "melange permite a los usuarios construir paquetes apk usando pipelines declarativos. Desde la versi\u00f3n 0.10.0 hasta antes de la 0.40.3, un atacante que pueda influir en las entradas del pipeline de parche podr\u00eda ejecutar comandos de shell arbitrarios en el host de compilaci\u00f3n. El pipeline de parche en pkg/build/pipelines/patch.yaml incrusta valores derivados de la entrada (rutas de series, nombres de archivo de parche y par\u00e1metros num\u00e9ricos) en scripts de shell sin la debida entrecomillado o validaci\u00f3n, permitiendo que los metacaracteres de shell salgan de su contexto previsto. La vulnerabilidad afecta al pipeline de parche incorporado que puede ser invocado a trav\u00e9s de las operaciones melange build y melange license-check. Un atacante que pueda controlar las entradas relacionadas con el parche (por ejemplo, a trav\u00e9s de CI impulsado por solicitudes de extracci\u00f3n, build-as-a-service, o influyendo en las configuraciones de melange) puede inyectar metacaracteres de shell como backticks, sustituciones de comandos $(\u2026), puntos y coma, pipes o redirecciones para ejecutar comandos arbitrarios con los privilegios del proceso de compilaci\u00f3n de melange. Este problema ha sido parcheado en la versi\u00f3n 0.40.3."}], "id": "CVE-2026-25143", "lastModified": "2026-06-17T10:24:10.980", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-25143", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-02-05T14:23:13.745880Z", "version": "2.0.3"}}]}, "published": "2026-02-04T20:16:06.227", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/chainguard-dev/melange/commit/bd132535cd9f57d4bd39d9ead0633598941af030"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-rf4g-89h5-crcr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-17T23:19:09.306938+00:00", "value": {"mitigation_remediation": ["Upgrade Chainguard melange to version 0.40.3 or later to apply the official patch", "If an upgrade is not immediately possible, validate or sanitize all patch\u2011related inputs before they are embedded into shell scripts, ensuring that shell metacharacters are escaped or removed", "Restrict the use of the patch pipeline from external sources such as pull requests or untrusted CI configurations, or disable the pipeline entirely until a secure version is deployed"], "summary": {"action": "Apply Patch", "impact": "Arbitrary host command execution via crafted patch inputs"}, "threat_synthesis": {"affected_systems": "The issue affects Chainguard\u2019s melange version 0.10.0 up to, but not including, 0.40.3. Any deployment of these versions that uses the default patch pipeline \u2013 invoked through melange build or melange license\u2011check operations \u2013 is vulnerable. Versions 0.40.3 and newer contain the patch.", "description_and_impact": "The vulnerability is an input-handling flaw in melange\u2019s patch pipeline, where values supplied through patch-related inputs are incorporated into shell scripts without proper quoting or validation. This flaw permits an attacker to inject shell metacharacters and run arbitrary commands with the privileges of the melange build process, compromising confidentiality, integrity, and availability of the build host. It is classified as CWE\u201178: OS Command Injection.", "risk_and_exploitability": "The CVSS score of 7.8 indicates a high\u2011severity vulnerability. The EPSS score of less than 1\u202f% suggests that exploitation is currently low probability, and the vulnerability is not listed in CISA\u2019s KEV catalog. However, the flaw can be leveraged through the patch pipeline by an attacker who can influence inputs, such as through pull\u2011request driven continuous integration, build\u2011as\u2011a\u2011service setups, or untrusted configuration values. The attack can be performed without requiring additional credentials, relying solely on the ability to tamper with patch\u2011related inputs."}}}}, "created": "2026-02-05T11:40:02.594191+00:00", "updated": "2026-04-17T23:30:15.906353+00:00", "vendors": ["chainguard-dev", "chainguard-dev$PRODUCT$melange"]}