fix: upgrade Go to 1.26.3 to resolve CVE-2026-33814#3099
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CVE-2026-33814 is an infinite loop vulnerability in Go's HTTP/2 transport implementation. When an HTTP/2 client receives a SETTINGS frame with SETTINGS_MAX_FRAME_SIZE set to 0 from a malicious server, the transport enters an infinite loop writing CONTINUATION frames. This vulnerability affects all gRPC clients in the Chainloop codebase, including the CLI and inter-service communication components, as gRPC uses HTTP/2 transport. Upgrading to Go 1.26.3 includes the fix that properly validates SETTINGS_MAX_FRAME_SIZE values to prevent the infinite loop condition. Assisted-by: Claude Code
migmartri
previously approved these changes
May 10, 2026
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Propagate the Go 1.26.3 upgrade to the goreleaser Dockerfiles and CLAUDE.md so the runtime images and documentation match go.mod. Assisted-by: Claude Code Signed-off-by: Miguel Martinez Trivino <miguel@chainloop.dev>
migmartri
approved these changes
May 10, 2026
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Summary
Upgrade Go from 1.26.2 to 1.26.3 to remediate CVE-2026-33814, an infinite loop vulnerability in HTTP/2 transport that affects all gRPC clients in the Chainloop codebase.
Vulnerability Fixed
CVE-2026-33814 (HIGH severity)
When processing HTTP/2 SETTINGS frames, the Go transport enters an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0. This can cause denial of service, resource exhaustion, and service disruption in CI/CD pipelines.
Changes Made
go.modto use Go 1.26.3 (from 1.26.2)Impact
This vulnerability is reachable in Chainloop because:
The fix ensures all gRPC clients are protected from malicious servers sending malformed SETTINGS frames.