漏洞摘要 CVE ID: CVE-2026-26007 严重性: High CVE-345 漏洞细节 受影响版本: =46.0.5 问题描述 The (or ), , and functions do not verify that the point belongs to the expected prime-order subgroup of the curve. This missing validation allows an attacker to provide a public key point _P_ from a small-order subgroup. This can lead to security issues in various situations, such as the most commonly used signature verification (ECDSA) and shared key negotiation (ECDH). When the victim computes the shared secret as _S = [victim_private_key]P_ via ECDH, this leaks information about _victim_private_key mod (small_subgroup_order)_. For curves with cofactor > 1, this reveals the least significant bits of the private key. When these weak public keys are used in ECDSA, it's easy to forge signatures on the small subgroup. Only SECT curves are impacted by this. 发现者 XlabAI Team of Tencent Xuanwu Lab Atuin Automated Vulnerability Discovery Engine