Loading vulnerability…
CVE-2026-39819 is a symlink-following vulnerability in the Go toolchain's go bug command. The command creates two temporary files using predictable names in the system temporary directory without safely preventing pre-existing symbolic links. A local attacker able to create a symlink at one of the expected temporary-file locations can cause the command to write to the symlink target.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
go bug. The resulting integrity impact depends on the selected target and the privileges of that user; overwriting configuration, source, build, or other security-relevant files could facilitate further compromise or disruption.If you can’t patch tonight, do this now.
go bug, avoid running the command with elevated privileges, and prevent untrusted users from creating entries in the temporary directory used by the command.Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
86 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A locally exploitable vulnerability affecting Huawei EulerOS 2.0 Golang packages. The provided CVSS v3 vector indicates high attack complexity, low privileges required, no user interaction, low confidentiality impact, and high integrity impact.
A Huawei EulerOS Golang-package vulnerability tracked by the EulerOS_SA-2026-3339 local security check. The supplied CVSS v3 vector indicates local access, low privileges, high attack complexity, low confidentiality impact, and high integrity impact.
A vulnerability addressed by TencentOS security advisory TSSA-2026-0888; technical details are not provided.
An arbitrary-file-overwrite vulnerability in Go's 'go bug' command caused by a symlink attack.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.