{"id":"EUVD-2026-57928","revision":"2c18695da95f406a8a5c4058b5e07cf0","records":[{"revision":"2c18695da95f406a8a5c4058b5e07cf0","observedAt":"2026-10-30T08:51:19.364+00:00","statement":{"source":"euvd","id":"EUVD-2026-57928","aliases":["CVE-2026-48702","GHSA-47q9-m4ww-924m"],"title":"Rekor is a software supply chain transparency log. Starting in version 0.3.0 and prior to version 1.5.2, the `Package.Unmarshal()` function in `pkg/types/alpine/apk.go` decompresses the signature and control gzip members of an APK file into…","description":"Rekor is a software supply chain transparency log. Starting in version 0.3.0 and prior to version 1.5.2, the `Package.Unmarshal()` function in `pkg/types/alpine/apk.go` decompresses the signature and control gzip members of an APK file into in-memory buffers without bounding the total decompressed size. The existing `max_apk_metadata_size` check (default 1MB) is only applied to individual tar entry header sizes after decompression completes, so it does not prevent a decompression bomb from consuming unbounded heap memory. An attacker can craft a gzip stream that compresses at a ~1000:1 ratio (e.g., 2MB compressed zeros → 2GB decompressed). When submitted as spec.package.content in an Alpine `ProposedEntry`, the server decompresses the full payload into memory during request processing, triggering a fatal Go runtime out-of-memory error or OS OOM-kill that cannot be caught by the server's recover() middleware. This is reachable via two unauthenticated endpoints, `POST /api/v1/log/entries (createLogEntry)` and `POST /api/v1/log/entries/retrieve (searchLogQuery)`. Both invoke `V001Entry.Canonicalize()` → `fetchExternalEntities()` → `apk.Unmarshal(packageData)`, which performs the unbounded decompression. Version 1.5.2 patches the issue. There is no effective workaround. Setting `max_request_body_size` reduces but does not eliminate exposure due to the ~1000:1 compression ratio (a 1MB body limit still allows ~1GB heap allocation). Setting `max_apk_metadata_size` has no effect on this vulnerability since the check is applied after decompression.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":null}],"references":["https://github.com/sigstore/rekor/security/advisories/GHSA-47q9-m4ww-924m"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-57928","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Aug 13, 2026, 1:14:19 PM","dateUpdated":"Aug 13, 2026, 3:16:26 PM"},"relatedAdvisories":[{"id":"openSUSE-SU-2026:11398-1","title":"tekton-cli-0.45.1-1.1 on GA media","vulnerabilityIds":["CVE-2026-48702","CVE-2026-49835"]},{"id":"RHSA-2026:35111","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","vulnerabilityIds":["CVE-2026-32285","CVE-2026-41506","CVE-2026-44740","CVE-2026-46680","CVE-2026-47262","CVE-2026-48702","CVE-2026-50195","CVE-2026-53488"]},{"id":"RHSA-2026:25138","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","vulnerabilityIds":["CVE-2026-41889","CVE-2026-45287","CVE-2026-48702"]},{"id":"openSUSE-SU-2026:11154-1","title":"hauler-2.0.1-1.1 on GA media","vulnerabilityIds":["CVE-2026-48702"]},{"id":"openSUSE-SU-2026:21262-1","title":"Security update for hauler","vulnerabilityIds":["CVE-2026-25680","CVE-2026-25681","CVE-2026-27136","CVE-2026-42502","CVE-2026-42506","CVE-2026-48702"]},{"id":"RHSA-2026:50873","title":"Red Hat Security Advisory: RHTAS 1.4.3 - Red Hat Trusted Artifact Signer Release","vulnerabilityIds":["CVE-2026-39831","CVE-2026-46597","CVE-2026-48702","CVE-2026-59869"]},{"id":"RHSA-2026:59439","title":"Red Hat Security Advisory: RHTAS 1.3.7 - Red Hat Trusted Artifact Signer Release","vulnerabilityIds":["CVE-2024-9355","CVE-2025-7783","CVE-2025-47907","CVE-2026-48702","CVE-2026-59869"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-57928","identifiers":["EUVD-2026-57928","CVE-2026-48702","GHSA-47q9-m4ww-924m"]},"retained":false,"historicalAffected":[]}],"coverage":[]}