grype defaults match.python.using-cpes to false, so PyPI packages are
matched only against the GitHub Advisory Database. When a CVE is
published to NVD but its GHSA has not propagated to the global advisory
database, the scan reports clean even though grype's own database
already carries the NVD record with the correct version ranges.
The pypdf CVEs (CVE-2026-59935 / 59936 / 59937 / 59938, analyzed in NVD
since 2026-07-08) are the case that exposed this; their GHSA IDs are
still repo-level and return 404 from the global advisory API, so the
ecosystem matcher has nothing to match on.
Enabling CPE matching for Python closes that gap. Measured against a
v1.91.1 build the finding count goes from 28 to 38; the additions are
mostly actionable, and the few cross-product CPE collisions cannot fail
the build because --only-fixed drops the ones carrying no fix version
and the remainder land below the --fail-on high threshold.
* ci(image-scan): add Grype image scan for OS + library CVEs
Builds each of the 6 Dockerfiles via a matrix and scans the resulting image
with Grype (pinned v0.114.0, sha256 verified), failing on fixable HIGH or
CRITICAL across both OS/apk and language packages. This catches the layer
osv-scan is structurally blind to (Wolfi/apk OS packages and vendored deps
like prisma's node engine), which is the structural reason the openssl CVE
slipped past CI and a customer's image scanner flagged it.
Skipped on fork PRs so an outside contributor cannot run arbitrary code on
our hosted runner via a malicious Dockerfile RUN line. The same pattern is
used by guard-fork-dependencies.yml.
Grype runs as a pinned binary with a verified checksum, so there is no
mutable-tag GitHub Action in the dependency chain and no vendor credentials
in the scan job. The job uses read-only contents permissions and an empty
top-level permissions block.
* ci(image-scan): scan only Dockerfile.non_root (rootless target)
All Dockerfile variants share the same wolfi base and apk set today, so a single scan of Dockerfile.non_root gives the same OS-layer coverage at one-sixth the build cost. Dockerfile.non_root is the rootless variant we ship (USER 65534), so the scan tracks the image customers actually run. Matrix-scan if the variants ever diverge.
* ci: retrigger checks (proxy_pass_through_endpoint_tests flaked on prior run)
