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CVE-2025-68121 is a flaw in Go's crypto/tls session resumption logic. During a resumed TLS handshake, if the underlying tls.Config has its ClientCAs or RootCAs fields changed after the original handshake but before the resumed handshake, the resumption can succeed even though a full handshake under the new configuration should have failed. The issue can arise when an application clones a tls.Config and then mutates the returned configuration, or when it uses GetConfigForClient to supply configurations whose trust settings differ over time. As a result, certificate validation decisions made for the resumed session may no longer reflect the current trust anchors or client authentication policy, leading to incorrect acceptance of a peer during session resumption.
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173 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A certificate validation flaw in Go's crypto/tls during TLS session resumption.
A Go crypto/tls vulnerability involving incorrect certificate validation during TLS session resumption.
A crypto/tls flaw involving unexpected TLS session resumption behavior.
A Go crypto/tls flaw involving incorrect certificate validation or unexpected TLS session resumption.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.