CVE-2026-25122

MEDIUM

5.5

Description

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.

CVE Details

CVSS v3.1 Score5.5

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published2/4/2026

Last Modified2/20/2026

Sourcenvd

Honeypot Sightings0

Affected Products

chainguard:apko

Weaknesses (CWE)

CWE-400CWE-770

References

https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09(security-advisories@github.com)

https://github.com/chainguard-dev/apko/security/advisories/GHSA-6p9p-q6wh-9j89(security-advisories@github.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.