CVE Catalog

GHSA-2hw4-c9m4-f2fj

Medium
Published: —Translated: NVD NIST

Summary

Security advisory GHSA-2hw4-c9m4-f2fj concerns the knative/pkg component. Verification on 2026-05-19 confirmed end-to-end amplification of 4.5×, worse than the advisory's conservative 2× claim. A Go proof of concept (cmd/poc-c2/main.go) was built.

Risk Assessment

The confirmed 4.5× amplification means an attacker can trigger disproportionately large resource consumption relative to sent traffic, increasing the risk of denial-of-service attacks on components using knative/pkg.

Recommendation

Apply the fix referenced in advisory GHSA-2hw4-c9m4-f2fj for knative/pkg. Verify dependency versions in your projects and deploy the update.

Related vulnerabilities

Original NVD description (English source)

## ⚠️ Update (verification, 2026-05-19): C-2 confirmed end-to-end — **4.5× amplification observed** (worse than the advisory's conservative 2× claim) Built a Go PoC ([`cmd/poc-c2/main.go`](https://github.com/knative/pkg/blob/1ad5a1ce0ee7043081cb50fd1acc6d36a9126844/cmd/poc-c2/main.go)) that runs th

Vulnerability data from NVD (NIST) · CISA KEV · EPSS