Threats Tagged 'ghsa-jch3-5j66-88vx'
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Threats Tagged 'ghsa-jch3-5j66-88vx'
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A vulnerability in Bouncy Castle for Java before version 1.86 affects the Messaging Layer Security (MLS) implementation. The issue is that the X.509 credential was not properly bound to a LeafNode's signature key, allowing an attacker to present another party's certificate as their own. This flaw could enable an unauthenticated attacker to impersonate a victim's identity within a group, evict the victim, decrypt group messages, and send messages accepted as the victim. The vulnerability is fixed by requiring the end-entity certificate's public key to match the signature key in the LeafNode. Deployments using only basic credentials are not affected. Join the discussion | GCVE Database | 10/03/2026, 09:31:18 UTC Added: 10/03/2026, 17:20:59 UTC |
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