melange allows users to build apk packages using declarative pipelines. In version 0.40.5 and prior, melange update-cache downloads URIs from build configs via io.Copy without any size limit or HTTP client timeout (pkg/renovate/cache/cache.go). An attacker-controlled URI in a melange config can cause unbounded disk writes, exhausting disk on the build runne. Version 0.43.4 contains a patch.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-400",
"CWE-918"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29049.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:chainguard:melange:*:*:*:*:*:go:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "0.40.5"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "652ca5af08588f78e2d405e64b058fac8398d23f"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v0.43.4",
"range": [
{
"fixed": "ba26216d9671b7fd8e2696a3a217f441f2e04b05"
}
],
"source": "REFERENCES_TAG"
}
]
}