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CVE-2026-42576
apko `DiscoverKeys` has a panic on non-rsa jwks key that causes crash during key discovery
Medium6.5EPSS 0.25%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
apko allows users to build and publish OCI container images built from apk packages. Prior to version 1.2.7, DiscoverKeys in pkg/apk/apk/implementation.go unconditionally type-asserts JWKS keys as *rsa.PublicKey without checking the key type. If a repository JWKS endpoint returns a non-RSA key (e.g. EC), the unchecked assertion panics and crashes apko. This affects any workflow that initializes the APK database and fetches repository keys. This issue has been patched in version 1.2.7.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVDNVD · Deferred | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.25% · top 83% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
- affected < 1.2.7
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gochainguard.dev/apkoGHSA-m7hm-vm4x-28jf (opens in a new tab)
References (3)
- https://github.com/chainguard-dev/apko/security/advisories/GHSA-m7hm-vm4x-28jf (opens in a new tab)x_refsource_CONFIRM
- https://github.com/chainguard-dev/apko/commit/6604826b19e36e9bc6e196592800fad93738f4a1 (opens in a new tab)x_refsource_MISC
- https://github.com/chainguard-dev/apko/releases/tag/v1.2.7 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-m7hm-vm4x-28jf (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-42576)Record last updated .