CVE-2026-59252

Improper Validation of Specified Quantity in Input in ZenHive mpp allows an unauthenticated remote client to drain the fee-payer wallet, resulting in denial of service for legitimate clients. When the mpp Elixir library is configured as fee payer (fee_payer: true), the MPP.Methods.Tempo payment method co-signs and broadcasts a client-supplied EVM transaction without first validating that the client-supplied gas_limit is sufficient to complete the intended call. A malicious client can submit a signed transferWithMemo transaction with gas_limit deliberately set just below the amount required for successful execution. The server co-signs the transaction and broadcasts it via rpc_broadcast_sync. The transaction runs out of gas during EVM execution and reverts, but the fee-payer wallet is still charged for the burned gas while the client pays nothing and receives no resource. Repeated requests from one or more malicious clients drain the fee-payer wallet at near-zero cost to the attacker, ultimately preventing the server from sponsoring gas for legitimate payment requests. The wait_for_confirmation = false (optimistic) path is also affected: it invokes simulate_payment_call via eth_call, but that simulation omits the gas parameter and therefore does not catch out-of-gas conditions. This issue affects mpp: from 0.2.0 before 0.6.0.

• CWE-1284

• https://cna.erlef.org/cves/CVE-2026-59252.html
• https://github.com/ZenHive/mpp/commit/d84e3e528db39654540c2035ea0fbdf7b950d3d1
• https://github.com/ZenHive/mpp/security/advisories/GHSA-vj8p-hp9x-gh47
• https://osv.dev/vulnerability/EEF-CVE-2026-59252
• https://github.com/ZenHive/mpp/security/advisories/GHSA-vj8p-hp9x-gh47

Published

Jul 17, 2026

Last Modified

Jul 17, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-59246Allocation of resources without limits vulnerability in elix…6.3
• CVE-2026-59247Insufficient Verification of Data Authenticity vulnerability…7.6
• CVE-2026-59248Allocation of resources without limits vulnerability in nine…8.7
• CVE-2026-59249Inconsistent interpretation of HTTP requests (HTTP response …6.3
• CVE-2026-59250Classic buffer overflow in the Erlang/OTP megaco flex scanne…8.3
• CVE-2026-59251Allocation of resources without limits in Erlang/OTP public_…7.5
• CVE-2026-59253n8n before 2.28.0 contains an improper authorization vulnera…5
• CVE-2026-59254n8n before 2.28.1 contains an information disclosure vulnera…6.3
• CVE-2026-59255BloodHound through 9.4.0, fixed in commit 8f79035, contains …7.1
• CVE-2026-59257n8n before 1.123.61, 2.x before 2.27.4, and 2.28.x before 2.…8.8
• CVE-2026-59258immich before 3.0.3 contains a broken access control vulnera…8.3
• CVE-2026-59259n8n before versions 1.123.61, 2.27.4, and 2.28.1 contains a …6.5