[scality-renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
golang.org/x/mod	v0.38.0 → v0.40.0

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Fix transparency log tile verification bypass in golang.org/x/mod/sumdb/tlog

BIT-golang-2026-56865 / CVE-2026-56865 / GO-2026-6179

More information

Details

A malicious GOPROXY was previously capable of forging up to two sumdb tiles that allow for a requested module to bypass the GOSUMDB check and persist attacker-controlled module content to a local Go module cache.

This attack allows for a malicious GOPROXY to serve malicious module content that cannot be detected by evaluating the transparency log.

All tiles are now correctly verified against their parents.

In order to determine if you have been affected:

rm -r go.sum go.work.sum vendor/ && go mod tidy

Severity

Unknown

References

• https://go.dev/issue/80744
• https://groups.google.com/g/golang-announce/c/94pEornpRlI
• https://go.dev/cl/814960
• https://go.dev/cl/815020

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

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Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb

BIT-golang-2026-56864 / CVE-2026-56864 / GO-2026-6180

More information

Details

A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log.

This attack allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content that cannot be detected by evaluating the transparency log.

In order to determine if you have been affected:

rm -r go.sum go.work.sum vendor/ && go mod tidy

Severity

Unknown

References

• https://go.dev/issue/80745
• https://groups.google.com/g/golang-announce/c/94pEornpRlI
• https://go.dev/cl/815000
• https://go.dev/cl/815020

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

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This PR has been generated by Mend Renovate CLI.

[scality-renovate]

ℹ️ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 2 additional dependencies were updated

Details:

Package	Change
golang.org/x/net	v0.57.0 -> v0.58.0
golang.org/x/tools	v0.48.0 -> v0.49.0

[github-actions]

Dependency Bump Evaluation

Version change: golang.org/x/mod v0.38.0 → v0.40.0 (minor, 2 versions)
Semver bump type: minor

Changes:

• Security fix for CVE-2026-56865 (GO-2026-6179): transparency log tile verification bypass in sumdb/tlog — a malicious GOPROXY could forge tiles to bypass GOSUMDB checks
• Security fix for CVE-2026-56864 (GO-2026-6180): malicious GOSUMDB could serve arbitrary module content not in the transparency log
• 2 routine golang.org/x dependency update commits (no API changes)

Breaking changes: None — no API changes between v0.38.0 and v0.40.0

Security concerns: The CVEs address supply chain integrity of Go module verification (sumdb/tlog). While this project does not directly import the affected packages, they are used by the Go toolchain during module resolution. Fixing these strengthens build-time supply chain security. Priority: merge promptly.

Impact on codebase:

• golang.org/x/mod is an indirect dependency — no direct imports found in any .go source file
• No usage of sumdb or tlog packages in the codebase
• Only go.mod and go.sum are modified; no vendor directory in this project

Recommendation: SAFE TO MERGE (once CI passes — build, lint, and test checks are currently in progress)

Notes: PR authored by scality-renovate[bot] (not dependabot), so providing evaluation as comment only.

— Claude Code

[g-carre]

LGTM