Vulnerability Details CVE-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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.5%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2026-25122
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cpe:2.3:a:chainguard:apko:0.14.8
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cpe:2.3:a:chainguard:apko:0.14.9
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cpe:2.3:a:chainguard:apko:0.15.0
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cpe:2.3:a:chainguard:apko:0.16.0
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cpe:2.3:a:chainguard:apko:0.17.0
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cpe:2.3:a:chainguard:apko:0.18.0
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cpe:2.3:a:chainguard:apko:0.18.1
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cpe:2.3:a:chainguard:apko:0.19.0
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cpe:2.3:a:chainguard:apko:0.19.1
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cpe:2.3:a:chainguard:apko:0.19.2
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cpe:2.3:a:chainguard:apko:0.19.3
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cpe:2.3:a:chainguard:apko:0.19.4
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cpe:2.3:a:chainguard:apko:0.19.5
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cpe:2.3:a:chainguard:apko:0.19.6
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cpe:2.3:a:chainguard:apko:0.19.7
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cpe:2.3:a:chainguard:apko:0.19.8
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cpe:2.3:a:chainguard:apko:0.19.9
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cpe:2.3:a:chainguard:apko:0.20.0
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cpe:2.3:a:chainguard:apko:0.20.1
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cpe:2.3:a:chainguard:apko:0.20.2
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cpe:2.3:a:chainguard:apko:0.21.0
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cpe:2.3:a:chainguard:apko:0.22.0
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cpe:2.3:a:chainguard:apko:0.22.1
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cpe:2.3:a:chainguard:apko:0.22.2
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cpe:2.3:a:chainguard:apko:0.22.3
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cpe:2.3:a:chainguard:apko:0.22.4
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cpe:2.3:a:chainguard:apko:0.22.5
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cpe:2.3:a:chainguard:apko:0.22.6
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cpe:2.3:a:chainguard:apko:0.22.7
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cpe:2.3:a:chainguard:apko:0.23.0
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cpe:2.3:a:chainguard:apko:0.24.0
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cpe:2.3:a:chainguard:apko:0.25.0
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cpe:2.3:a:chainguard:apko:0.25.1
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cpe:2.3:a:chainguard:apko:0.25.2
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cpe:2.3:a:chainguard:apko:0.25.3
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cpe:2.3:a:chainguard:apko:0.25.4
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cpe:2.3:a:chainguard:apko:0.25.5
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cpe:2.3:a:chainguard:apko:0.25.6
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cpe:2.3:a:chainguard:apko:0.25.7
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cpe:2.3:a:chainguard:apko:0.26.0
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cpe:2.3:a:chainguard:apko:0.26.1
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cpe:2.3:a:chainguard:apko:0.27.0
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cpe:2.3:a:chainguard:apko:0.27.1
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cpe:2.3:a:chainguard:apko:0.27.2
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cpe:2.3:a:chainguard:apko:0.27.3
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cpe:2.3:a:chainguard:apko:0.27.4
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cpe:2.3:a:chainguard:apko:0.27.5
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cpe:2.3:a:chainguard:apko:0.27.6
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cpe:2.3:a:chainguard:apko:0.27.7
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cpe:2.3:a:chainguard:apko:0.27.8
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cpe:2.3:a:chainguard:apko:0.27.9
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cpe:2.3:a:chainguard:apko:0.28.0
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cpe:2.3:a:chainguard:apko:0.29.0
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cpe:2.3:a:chainguard:apko:0.29.1
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cpe:2.3:a:chainguard:apko:0.29.10
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cpe:2.3:a:chainguard:apko:0.29.2
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cpe:2.3:a:chainguard:apko:0.29.3
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cpe:2.3:a:chainguard:apko:0.29.4
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cpe:2.3:a:chainguard:apko:0.29.5
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cpe:2.3:a:chainguard:apko:0.29.6
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cpe:2.3:a:chainguard:apko:0.29.7
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cpe:2.3:a:chainguard:apko:0.29.8
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cpe:2.3:a:chainguard:apko:0.29.9
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cpe:2.3:a:chainguard:apko:0.30.0
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cpe:2.3:a:chainguard:apko:0.30.1
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cpe:2.3:a:chainguard:apko:0.30.10
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cpe:2.3:a:chainguard:apko:0.30.11
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cpe:2.3:a:chainguard:apko:0.30.12
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cpe:2.3:a:chainguard:apko:0.30.13
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cpe:2.3:a:chainguard:apko:0.30.14
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cpe:2.3:a:chainguard:apko:0.30.15
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cpe:2.3:a:chainguard:apko:0.30.16
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cpe:2.3:a:chainguard:apko:0.30.17
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cpe:2.3:a:chainguard:apko:0.30.18
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cpe:2.3:a:chainguard:apko:0.30.19
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cpe:2.3:a:chainguard:apko:0.30.2
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cpe:2.3:a:chainguard:apko:0.30.20
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cpe:2.3:a:chainguard:apko:0.30.21
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cpe:2.3:a:chainguard:apko:0.30.22
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cpe:2.3:a:chainguard:apko:0.30.23
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cpe:2.3:a:chainguard:apko:0.30.24
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cpe:2.3:a:chainguard:apko:0.30.25
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cpe:2.3:a:chainguard:apko:0.30.26
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cpe:2.3:a:chainguard:apko:0.30.27
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cpe:2.3:a:chainguard:apko:0.30.28
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cpe:2.3:a:chainguard:apko:0.30.29
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cpe:2.3:a:chainguard:apko:0.30.3
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cpe:2.3:a:chainguard:apko:0.30.30
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cpe:2.3:a:chainguard:apko:0.30.31
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cpe:2.3:a:chainguard:apko:0.30.32
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cpe:2.3:a:chainguard:apko:0.30.33
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cpe:2.3:a:chainguard:apko:0.30.34
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cpe:2.3:a:chainguard:apko:0.30.35
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cpe:2.3:a:chainguard:apko:0.30.4
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cpe:2.3:a:chainguard:apko:0.30.5
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cpe:2.3:a:chainguard:apko:0.30.6
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cpe:2.3:a:chainguard:apko:0.30.7
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cpe:2.3:a:chainguard:apko:0.30.8
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cpe:2.3:a:chainguard:apko:0.30.9
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cpe:2.3:a:chainguard:apko:1.0.0
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cpe:2.3:a:chainguard:apko:1.0.1
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cpe:2.3:a:chainguard:apko:1.0.2
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cpe:2.3:a:chainguard:apko:1.0.3
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cpe:2.3:a:chainguard:apko:1.0.4
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cpe:2.3:a:chainguard:apko:1.0.5