CVE-2026-56865

A flaw was found in golang.org/x/mod/sumdb/tlog. A malicious Go proxy GOPROXY could exploit this vulnerability by forging sumdb tiles. This allowed the proxy to bypass integrity checks and serve malicious module content to a local Go module cache, which would then go undetected by the transparenc...

CVE-2026-56865

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...