CVE-2026-25122
published 2026-02-04CVE-2026-25122: apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.0, expandapk.Split drains the first gzip…
PriorityP422medium5.5CVSS 3.1
AVLACLPRNUIRSUCNINAH
EPSS
0.11%
1.3th percentile
apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.0, expandapk.Split drains the first gzip stream of an APK archive via io.Copy(io.Discard, gzi) without explicit bounds. With an attacker-controlled input stream, this can force large gzip inflation work and lead to resource exhaustion (availability impact). The Split function reads the first tar header, then drains the remainder of the gzip stream by reading from the gzip reader directly without any maximum uncompressed byte limit or inflate-ratio cap. A caller that parses attacker-controlled APK streams may be forced to spend excessive CPU time inflating gzip data, leading to timeouts or process slowdown. This issue has been patched in version 1.1.0.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| chainguard-dev | apko | — | — |
| chainguard.dev | apko | >= 0.14.8 < 1.1.0 | 1.1.0 |
| chainguard | apko | >= 0.14.8 < 1.1.0 | 1.1.0 |
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OSV
apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams in chainguard.dev/apko
osv·2026-02-05
CVE-2026-25122 apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams in chainguard.dev/apko
apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams in chainguard.dev/apko
apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams in chainguard.dev/apko
GHSA
apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams
ghsa·2026-02-03
CVE-2026-25122 [MEDIUM] CWE-400 apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams
apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams
`expandapk.Split` drains the first gzip stream of an APK archive via `io.Copy(io.Discard, gzi)` without explicit bounds. With an attacker-controlled input stream, this can force large gzip inflation work and lead to resource exhaustion (availability impact).
The `Split` function reads the first tar header, then drains the remainder of the gzip stream by reading from the gzip reader directly without any maximum uncompressed byte limit or inflate-ratio cap. A caller that parses attacker-controlled APK streams may be forced to spend excessive CPU time inflating gzip data, leading to timeouts or process slowdown.
**Fix:** Fixed with [2be3903](https://github.com/chainguard-dev/apko/commit/2
OSV
apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams
osv·2026-02-03
CVE-2026-25122 [MEDIUM] apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams
apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams
`expandapk.Split` drains the first gzip stream of an APK archive via `io.Copy(io.Discard, gzi)` without explicit bounds. With an attacker-controlled input stream, this can force large gzip inflation work and lead to resource exhaustion (availability impact).
The `Split` function reads the first tar header, then drains the remainder of the gzip stream by reading from the gzip reader directly without any maximum uncompressed byte limit or inflate-ratio cap. A caller that parses attacker-controlled APK streams may be forced to spend excessive CPU time inflating gzip data, leading to timeouts or process slowdown.
**Fix:** Fixed with [2be3903](https://github.com/chainguard-dev/apko/commit/2
No detection rules found.
No public exploits indexed.
2026-02-04
Published