CVE-2026-29049: chainguard-dev melange Uncontrolled Resource Consumption
Vulnerability summary
CVE-2026-29049 is a medium (CVSS 4.3) Uncontrolled Resource Consumption vulnerability in chainguard-dev melange. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 33.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 2 · Related 3Timeline
- 06-03-2026PublishedVulnerability first disclosed.
- 07-07-2026Last modifiedVulnerability information updated.
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 metrics
5 scores · 5 sources · 1 version- OSV · WolfiEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- OSV · GoEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- OSV · ChainguardEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- NVDNIST4.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
EPSS trend
Probability
0.41%
Chance of exploitation in the next 30 days
Percentile
34%
Versus all other CVEs
30-day change
+0.18 pp
From 0.22% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-918Server-Side Request Forgery (SSRF)The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
Affected systems
Chainguard6 products
- apply-cve-bump< 0.2.300-r0
- cg< 0.2.300-r0
- dl< 0.0.20260623145845-r0
- melangeAll versions (No fix recorded)
- wolfictl< 0.39.20-r1
Wolfi2 products
- melangeAll versions (No fix recorded)
- wolfictl< 0.39.20-r1
Chainguard-dev1 product
- melange< 0.43.4
Chainguard.dev1 product
- melange< 0.43.4 | All versions (No fix recorded)
4 vendors · 10 products
References
7 links- github.com/chainguard-dev/melange/security/advisories/GHSA-7rp8-r62p-q6wcX Refsource CONFIRMAdvisoryWEBVendor Advisory
- github.com/chainguard-dev/melange/commit/652ca5af08588f78e2d405e64b058fac8398d23fX Refsource MISCFIXWEB
