GO-2026-6179

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 canno

High highest severity reported · also known as CVE-2026-56865

12
catalog tools match this advisory
4
ship the vulnerable code in their release binary (Go tools analyzed with govulncheck)
No
in the CISA KEV catalog
0.1%
EPSS for CVE-2026-56865, percentile 3

Catalog tools matching GO-2026-6179

ToolVersion scannedPackageFixed inReleased binaryDeclared in or found inDispute
bomber
Software Composition Analysis (SCA)
v0.5.1golang.org/x/mod@v0.21.0
golang
0.40.0vulnerable code in binarygo.modDispute
notation
Artifact Signing & Verification
v1.3.2golang.org/x/mod@v0.24.0
golang
0.40.0vulnerable code in binarygo.modDispute
nuclei
API & Dynamic Testing (DAST)
v3.11.1golang.org/x/mod@v0.37.0
golang
0.40.0vulnerable code in binarygo.modDispute
vet
Software Composition Analysis (SCA)
v1.20.0golang.org/x/mod@v0.38.0
golang
0.40.0vulnerable code in binarygo.modDispute
external-secrets
Secret Management
v2.14.0golang.org/x/mod@v0.2.0
golang
0.40.0not analyzedhack/tools/gen-crd-api-reference-docs/go.modDispute
govulncheck
Static Application Security Testing (SAST) › Language-specific › Go
v1.1.4golang.org/x/mod@v0.22.0
golang
0.40.0not analyzedgo.modDispute
infisical
Secret Management
v0.167.4golang.org/x/mod@v0.37.0
golang
0.40.0not analyzedbackend-go/go.modDispute
opa
Policy as Code
v1.22.0golang.org/x/mod@v0.35.0
golang
0.40.0not in released binarybuild/tools/go.modDispute
clair
Container Security › Image Scanning
v4.9.0golang.org/x/mod@v0.30.0
golang
0.40.0not in released binarygo.modDispute
slsa-verifier
Supply Chain Compliance
v2.7.1golang.org/x/mod@v0.25.0
golang
0.40.0module in binarygo.modDispute
kube-linter
Kubernetes Security
v0.8.3golang.org/x/mod@v0.33.0
golang
0.40.0not in released binarytool-imports/go.modDispute
steampipe
Cloud Security
v2.4.9golang.org/x/mod@v0.38.0
golang
0.40.0not in released binarygo.modDispute

Vulnerabilities are known advisories that Grype matches against the dependencies declared in each project's release source (manifests and lockfiles, including development and build dependencies). A match does not mean the tool is exploitable: the vulnerable code may be unused, test-only, or not shipped in the released binary. KEV: listed in the CISA Known Exploited Vulnerabilities catalog. EPSS: FIRST's estimated probability of exploitation in the next 30 days. Both describe the vulnerability in general, not its exploitability through this tool; a match in a workflow file refers to a GitHub Action, not to shipped code. Released binary is only analyzed for Go tools with a Linux release binary; other tools show not analyzed.

Advisory sources

Go vulnerability GO-2026-6179 · NVD CVE-2026-56865 · OSV GO-2026-6179

Grype data sources: https://go.dev/issue/80744