CVE-2026-29049: CWE-400: Uncontrolled Resource Consumption in chainguard-dev melange
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.
AI Analysis
Technical Summary
CVE-2026-29049 describes an uncontrolled resource consumption vulnerability in chainguard-dev's melange product. In versions 0.40.5 and prior, the update-cache function downloads data from attacker-controlled URIs using io.Copy without imposing size limits or HTTP client timeouts. This allows an attacker to cause unbounded disk writes, potentially exhausting disk space on the build runner. The vulnerability is addressed in melange version 0.43.4.
Potential Impact
An attacker who can supply a malicious URI in a melange build configuration can cause the build runner to consume excessive disk space, leading to denial of service by exhausting disk resources. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Users should upgrade melange to version 0.43.4 or later, where the vulnerability is patched. No other mitigations are indicated in the advisory.
CVE-2026-29049: CWE-400: Uncontrolled Resource Consumption in chainguard-dev melange
Description
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.
CVSS v3.1
Score 4.3medium
Affected software
pkg:github/chainguard-dev/melangeRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-29049 describes an uncontrolled resource consumption vulnerability in chainguard-dev's melange product. In versions 0.40.5 and prior, the update-cache function downloads data from attacker-controlled URIs using io.Copy without imposing size limits or HTTP client timeouts. This allows an attacker to cause unbounded disk writes, potentially exhausting disk space on the build runner. The vulnerability is addressed in melange version 0.43.4.
Potential Impact
An attacker who can supply a malicious URI in a melange build configuration can cause the build runner to consume excessive disk space, leading to denial of service by exhausting disk resources. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Users should upgrade melange to version 0.43.4 or later, where the vulnerability is patched. No other mitigations are indicated in the advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-03T17:50:11.243Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69aa7f36c48b3f10ff26b92f
Added to database: 03/06/2026, 07:16:06 UTC
Last enriched: 07/08/2026, 10:51:12 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 172
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