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CVE-2026-39832 is a security bypass in golang.org/x/crypto/ssh/agent. When a client added a key to a remote SSH agent, constraint extensions, including destination-restriction extensions, were not serialized into the agent request. Consequently, a destination-restricted key forwarded to a remote host was added without its restrictions. The flaw also affected the in-memory agent returned by NewKeyring(), which silently ignored unsupported constraint extensions rather than rejecting the key. Fixed versions serialize all constraint extensions and reject unsupported extensions in NewKeyring().
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
51 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by the openSUSE glab package update; no technical details are provided.
A vulnerability referenced in a Nutanix AOS security notice/plugin, but no specific technical details are provided in the content.
One of multiple vulnerabilities in golang.org/x/crypto/ssh.
A vulnerability in Go's x/crypto/ssh agent component where agent constraints are dropped when forwarding keys.
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.