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Advisory record · GHSA-hcwr-pq9g-rq3m

apko doesn't verify downloaded apk packages against APKINDEX checksum (package substitution possible)

CVSS 7.5 HighEPSS 0.0016 · 5th percentile

Published by the GitHub Advisory Database at 4 May 2026, 21:27 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
chainguard.dev/apkoGo<1.2.71.2.7
Identifiers
GHSA-hcwr-pq9g-rq3m · CVE-2026-42575 · GO-2026-5422
Weakness (CWE)
CWE-345 · CWE-494
Tags
Published
4 May 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

apko versions before 1.2.7 do not check downloaded .apk packages against the checksums in the signed APKINDEX, so mismatched packages are accepted. An attacker who can tamper with download responses, such as through a compromised mirror, can install arbitrary packages into built images. Upgrade to 1.2.7, though the advisory text also says no fix is available yet.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0016, the 5th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:14 UTC First seen by agentprime
  2. 31 Oct 2026, 14:14 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.