mpp vulnerable to Gas Draining with low gas limit

Vulnerability When the server acts as the fee payer, mpp Elixir 0.4.0 ZenHive/mpp does not validate whether the gaslimit set by the client is enough before broadcasting. A malicious client can drain the server's gas without paying. A transferWithMemo call on Tempo Moderato testnet requires 51,299...

GHSA-VJ8P-HP9X-GH47 mpp vulnerable to Gas Draining with low gas limit

Vulnerability When the server acts as the fee payer, mpp Elixir 0.4.0 ZenHive/mpp does not validate whether the gaslimit set by the client is enough before broadcasting. A malicious client can drain the server's gas without paying. A transferWithMemo call on Tempo Moderato testnet requires 51,299...

mpp vulnerable to Gas Draining with access list

Details When the server acts as the feepayer, mpp Elixir 0.4.0 copies the client-supplied EIP-2930 access list verbatim into the cosigned fee-payer transaction. In cosignfeepayer, the server re-signs the raw basefields index 5 of the 0x76 AASigned envelope without inspecting the access list field...

GHSA-QPXH-FF8M-C62V mpp vulnerable to Gas Draining with access list

Details When the server acts as the feepayer, mpp Elixir 0.4.0 copies the client-supplied EIP-2930 access list verbatim into the cosigned fee-payer transaction. In cosignfeepayer, the server re-signs the raw basefields index 5 of the 0x76 AASigned envelope without inspecting the access list field...

mpp vulnerable to Gas Draining with no limit

Details When the server acts as the feepayer, the mpp Elixir 0.4.0 does not validate gaslimit, maxfeepergas and maxpriorityfeepergas before cosigning the client's fee-payer transaction. A malicious client embeds arbitrarily large maxfeepergas and maxpriorityfeepergas values in the signed envelope...

GHSA-VV77-66RF-PM86 mpp vulnerable to Gas Draining with no limit

Details When the server acts as the feepayer, the mpp Elixir 0.4.0 does not validate gaslimit, maxfeepergas and maxpriorityfeepergas before cosigning the client's fee-payer transaction. A malicious client embeds arbitrarily large maxfeepergas and maxpriorityfeepergas values in the signed envelope...

CVE-2026-89420

Improper Validation of Specified Quantity in Input in ZenHive mpp allows a client holding an open payment channel to obtain paid resources without being charged. MPP.Session.Actions.acceptvoucher/3 in lib/mpp/session/actions.ex treats a voucher whose cumulativeAmount equals the channel's...

CVE-2026-87119

Authentication Bypass by Capture-replay in ZenHive mpp allows an attacker holding a captured subscription activation credential to charge the payer repeatedly. The payer signs a Tempo KeyAuthorization over the chain id, key type, key id, expiry, limits and scopes only, with nothing tying it to th...

CVE-2026-87119

CVE-2026-87119 is an authentication bypass by capture-replay in ZenHive mpp (Elixir), affecting versions 0.14.0 through 0.16.1 . The root cause lies in MPP.Methods.Tempo.KeyAuthorization.verify/3: the payer signs a Tempo KeyAuthorization over the chain id, key type, key id, expiry, limits, and sc...

CVE-2026-87119 mpp Tempo subscription key authorization is not bound to the issuing challenge, allowing a captured activation credential to be replayed

Authentication Bypass by Capture-replay in ZenHive mpp allows an attacker holding a captured subscription activation credential to charge the payer repeatedly. The payer signs a Tempo KeyAuthorization over the chain id, key type, key id, expiry, limits and scopes only, with nothing tying it to th...

EUVD-2026-84361

Authentication Bypass by Capture-replay in ZenHive mpp allows an attacker holding a captured subscription activation credential to charge the payer repeatedly. The payer signs a Tempo KeyAuthorization over the chain id, key type, key id, expiry, limits and scopes only, with nothing tying it to th...

CVE-2026-87119 mpp Tempo subscription key authorization is not bound to the issuing challenge, allowing a captured activation credential to be replayed

Authentication Bypass by Capture-replay in ZenHive mpp allows an attacker holding a captured subscription activation credential to charge the payer repeatedly. The payer signs a Tempo KeyAuthorization over the chain id, key type, key id, expiry, limits and scopes only, with nothing tying it to th...

EEF-CVE-2026-87119 mpp Tempo subscription key authorization is not bound to the issuing challenge, allowing a captured activation credential to be replayed

Summary Authentication Bypass by Capture-replay in ZenHive mpp allows an attacker holding a captured subscription activation credential to charge the payer repeatedly. The payer signs a Tempo KeyAuthorization over the chain id, key type, key id, expiry, limits and scopes only, with nothing tying ...

CVE-2026-87119 mpp Tempo subscription key authorization is not bound to the issuing challenge, allowing a captured activation credential to be replayed

Authentication Bypass by Capture-replay in ZenHive mpp allows an attacker holding a captured subscription activation credential to charge the payer repeatedly. The payer signs a Tempo KeyAuthorization over the chain id, key type, key id, expiry, limits and scopes only, with nothing tying it to th...

EUVD-2026-84360

Improper Validation of Specified Quantity in Input in ZenHive mpp allows a client holding an open payment channel to obtain paid resources without being charged. MPP.Session.Actions.acceptvoucher/3 in lib/mpp/session/actions.ex treats a voucher whose cumulativeAmount equals the channel's...

CVE-2026-89420

ZenHive mpp (an Elixir payment-channel library) contains an improper quantity validation in MPP.Session.Actions.accept_voucher/3. A voucher whose cumulativeAmount equals the channel's already-accepted amount is treated as an idempotent success without decrementing the balance. Because the replay ...

CVE-2026-89420 Session voucher adding no new funds is accepted without a charge in mpp, serving paid resources for free

Improper Validation of Specified Quantity in Input in ZenHive mpp allows a client holding an open payment channel to obtain paid resources without being charged. MPP.Session.Actions.acceptvoucher/3 in lib/mpp/session/actions.ex treats a voucher whose cumulativeAmount equals the channel's...

EEF-CVE-2026-89420 Session voucher adding no new funds is accepted without a charge in mpp, serving paid resources for free

Summary Improper Validation of Specified Quantity in Input in ZenHive mpp allows a client holding an open payment channel to obtain paid resources without being charged. MPP.Session.Actions.acceptvoucher/3 in lib/mpp/session/actions.ex treats a voucher whose cumulativeAmount equals the channel's...

CVE-2026-89420 Session voucher adding no new funds is accepted without a charge in mpp, serving paid resources for free

Improper Validation of Specified Quantity in Input in ZenHive mpp allows a client holding an open payment channel to obtain paid resources without being charged. MPP.Session.Actions.acceptvoucher/3 in lib/mpp/session/actions.ex treats a voucher whose cumulativeAmount equals the channel's...

CVE-2026-89420 Session voucher adding no new funds is accepted without a charge in mpp, serving paid resources for free

Improper Validation of Specified Quantity in Input in ZenHive mpp allows a client holding an open payment channel to obtain paid resources without being charged. MPP.Session.Actions.acceptvoucher/3 in lib/mpp/session/actions.ex treats a voucher whose cumulativeAmount equals the channel's...