Apko
CVE-2026-25122
MEDIUM
GHSA-6p9p-q6wh-9j89
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V2 - Validation and Business Logic Resource consumption limits
MITRE ATT&CK
1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS 5.5 (MEDIUM). Attack vector: Local. Complexity: Low. Privileges required: None. User interaction: Required. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to build and publish OCI container images built from apk packages. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Resource exhaustion in Apko versions 0.14.8 through 1.0.x allows local attackers to cause denial of service by supplying a malicious APK archive with excessive gzip-compressed data that forces unbounded decompression work. The expandapk.Split function fails to impose limits on gzip inflation, enabling attackers to exhaust CPU resources and trigger process timeouts when parsing attacker-controlled APK streams. This issue is resolved in version 1.1.0.
Earlier versions of this analysis (1)
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. [CVSS 5.5 MEDIUM]
RemediationAI
A vendor patch is available — apply it immediately. Fixed in version 1.1.0..
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in go
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-400 (Uncontrolled Resource Consumption). Affects Apko. 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
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Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
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.
Executive ViewAI
Organizations using apko should be aware of moderate risk from CVE-2026-25122, a resource exhaustion vulnerability rated CVSS 5.5. Service availability could be impacted. A patch is available and should be applied during regular vulnerability management.
Apply vendor patch. If patching is delayed: implement rate limiting and resource quotas.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)GitHub Advisory
Apko versions up to 1.1.1 contains a vulnerability that allows attackers to build and publish OCI container images built
Apko versions 0.14.8 through 1.1.0 are vulnerable to denial of service when processing APK packages from untrusted repos
Exploit-DB