UBUNTU-CVE-2026-39819

The "go bug" command writes to two files with predictable names in the system temporary directory for example, "/tmp". An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink...

CVE-2026-33811

The CVE-2026-33811 entry describes a crash in the Go ecosystem when using LookupCNAME with the cgo DNS resolver: very long CNAME responses can trigger a double-free of C memory, leading to a crash. Affected item: Go net/cgo DNS resolver (LookupCNAME path). Root cause: memory management error (dou...

CVE-2026-42501 Malicious module proxy can bypass checksum database in cmd/go

A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy GOMODPROXY or checksum database GOSUMDB. A malicious module proxy can serve altered versions o...

CVE-2026-42501 Malicious module proxy can bypass checksum database in cmd/go

A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy GOMODPROXY or checksum database GOSUMDB. A malicious module proxy can serve altered versions o...

CVE-2026-42501

CVE-2026-42501 affects the Go toolchain download path via untrusted module proxies (GOMODPROXY) or checksum databases (GOSUMDB). The flaw allows a malicious module proxy to bypass checksum database validation when the Go toolchain is downloaded/selected (via GOTOOLCHAIN, go.work, or go.mod toolch...

CVE-2026-33811 Crash when handling long CNAME response in net

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash...

CVE-2026-42501 Malicious module proxy can bypass checksum database in cmd/go

A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy GOMODPROXY or checksum database GOSUMDB. A malicious module proxy can serve altered versions o...

CVE-2026-42501

A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy GOMODPROXY or checksum database GOSUMDB. A malicious module proxy can serve altered versions o...

CVE-2026-33811 Crash when handling long CNAME response in net

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash...

CVE-2026-42501

A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy GOMODPROXY or checksum database GOSUMDB. A malicious module proxy can serve altered versions o...

CVE-2026-42501

A malicious module proxy can exploit a flaw in the go command's validation of module checksums to bypass checksum database validation. This vulnerability affects any user using an untrusted module proxy GOMODPROXY or checksum database GOSUMDB. A malicious module proxy can serve altered versions o...

CVE-2026-39817

The "go tool pack" subcommand usually used only by the compiler as an internal tool with known-good inputs does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem...

CVE-2026-39817 Invoking "go tool pack" does not sanitize output paths in cmd/go

The "go tool pack" subcommand usually used only by the compiler as an internal tool with known-good inputs does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem...

CVE-2026-39819

The "go bug" command writes to two files with predictable names in the system temporary directory for example, "/tmp". An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink...

CVE-2026-39819

CVE-2026-39819 concerns the Go tool (go bug). The vulnerability arises when the command writes to two files with predictable names in the system temporary directory (e.g., /tmp). An attacker with access to the temporary directory can create a symlink in one of these names, causing the go bug proc...

CVE-2026-39817

The CVE-2026-39817 issue concerns the Go tool chain: the go tool pack subcommand (used internally by the compiler) does not sanitize output filenames. This allows an attacker to craft a malicious archive that, when unpacked via pack, can write files to arbitrary locations on the filesystem. Repor...

CVE-2026-39817

The "go tool pack" subcommand usually used only by the compiler as an internal tool with known-good inputs does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem...

CVE-2026-39817

The "go tool pack" subcommand usually used only by the compiler as an internal tool with known-good inputs does not sanitize output filenames. Extracting a malicious archive file with the "pack" subcommand can write files to arbitrary locations on the filesystem...

CVE-2026-39819 Invoking "go bug" follows symlinks in predictable temporary filenames in cmd/go

The "go bug" command writes to two files with predictable names in the system temporary directory for example, "/tmp". An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink...

CVE-2026-39825

CVE-2026-39825 concerns Go’s ReverseProxy (net/http/httputil). The issue: ReverseProxy forwards query parameters that are not visible to Rewrite/Director functions parsing parameters via url.ParseQuery. It does not respect ParseQuery’s limit on total query parameters (controlled by GODEBUG=urlmax...