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X402-foundation X402 vulnerabilities

x402-foundation @x402/extensions, x402, github.com/x402-foundation/x402/go/v2 +2 morex402 @x402/extensions 2.3.1 through 2.28.0 SIWX Payment Bypass via PaymentPayload.resourceCVE-2026-1136036.9 MediumOctober 20, 2026