CVE-2026-42575: apko doesn't verify downloaded apk packages against APKINDEX checksum (package substitution possible)

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

F-APKO-CHECKSUM-001

Public snapshot: 26 Sep 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

Recorded evidence

7.5high

CVE-2026-42575CVEchainguard-dev/apko

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

Fixed in: apko v1.2.7

patched

details

Finding IDs: F-APKO-CHECKSUM-001
CVE: CVE-2026-42575
GHSA: GHSA-hcwr-pq9g-rq3m
Status: patched
Fixed in: apko v1.2.7
Recorded credit: reporter: @1seal
Note: downloaded APK packages are not verified against APKINDEX checksum (package substitution possible)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVE registry state: PUBLISHED
CVE state checked: 23 Sep 2026

F-APKO-CHECKSUM-001: Verification failures. Package checksums are not enforced on the affected path. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-APKO-CHECKSUM-001

Security area (1seal assessment): Integrity. Package checksums are not enforced on the affected path. Reviewed 24 Sep 2026.

Clarify or correct this record privately. The email subject includes the finding ID. For an existing case, continue the agreed private thread. Do not post unpublished vulnerability details in public issues. Research disclosure policy.

How this page groups evidence

This identifier groups recorded evidence; it is not an additional CVE, independent-vulnerability count or guarantee of vendor confirmation. Fixed code, released versions, attribution and independent discovery are distinct claims. Absent metadata means not recorded, not disproved. Counting rules.