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CVE-2026-29049
melange: unbounded HTTP download in `melange update-cache` can exhaust disk in CI
Medium4.3EPSS 0.26%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 0.26% · top 82% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Weakness
Affected products
- affected < 0.43.4
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gochainguard.dev/melangeGHSA-7rp8-r62p-q6wc (opens in a new tab)
References (4)
- https://github.com/chainguard-dev/melange/security/advisories/GHSA-7rp8-r62p-q6wc (opens in a new tab)x_refsource_CONFIRM
- https://github.com/chainguard-dev/melange/pull/2379 (opens in a new tab)x_refsource_MISC
- https://github.com/chainguard-dev/melange/commit/652ca5af08588f78e2d405e64b058fac8398d23f (opens in a new tab)x_refsource_MISC
- https://github.com/chainguard-dev/melange/releases/tag/v0.43.4 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-7rp8-r62p-q6wc (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-29049)Record last updated .