Vulnerability · Published Feb 4, 2026 · Assigned by GitHub_M
CVE-2026-25140apko affected by potential unbounded resource consumption in expandapk.ExpandApk on attacker-controlled .apk streams
High 7.5
In plain English
A high-severity uncontrolled resource consumption in apko from chainguard-dev. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.1, an attacker who controls or compromises an APK repository used by apko could cause resource exhaustion on the build host. The ExpandApk function in pkg/apk/expandapk/expandapk.go expands .apk streams without enforcing decompression limits, allowing a malicious repository to serve a small, highly-compressed .apk that inflates into a large tar stream, consuming excessive disk space and CPU time, causing build failures or denial of service. This issue has been patched in version 1.1.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | chainguard.dev/apko | 1.1.1 | GO-2026-4410 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| chainguard-dev | apko | >= 0.14.8, < 1.1.1 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H