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CVE-2026-66035 libssh2 Heap Buffer Overflow via ETM Cipher Negotiation

🗓️ 24 Jul 2026 16:45:24Reported by VulnCheckType 
vulnrichment
 vulnrichment
🔗 github.com👁 2 Views

Pre-authentication heap overflow in libssh2 during Encrypt-then-MAC negotiation can corrupt heap metadata.

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24 Jul 2026 16:45Current
6.2Medium risk
Vulners AI Score6.2
CVSS 3.17.5
CVSS 47.7
SSVC
2