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8 vulnerabilities by wevm
CVE-2026-63628 (GCVE-0-2026-63628)
Vulnerability from nvd – Published: 2026-09-22 19:09 – Updated: 2026-09-24 14:17
VLAI
EPSS
VEX
Title
mppx: Gas Draining with access list
Summary
mppx is a TypeScript interface for machine payments protocol. Prior to 0.8.2, the fee-payer cosigning path in src/tempo/internal/fee-payer.ts copied a client-supplied access_list from a 0x78 FeePayerEnvelope without validating its length or contents. Because EIP-2930 access-list entries consume intrinsic gas even when the listed addresses are never used, a client could add fabricated address-only entries and cause the server fee_payer wallet to pay unnecessary transaction fees. The demonstrated 180-entry list remained within the 500,000 gas policy cap, 16 KB header limit, and RPC simulation budget while increasing the fee by approximately 9.4 times. This issue is fixed in version 0.8.2.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 14:17 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/wevm/mppx/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/wevm/mppx/pull/602 | x_refsource_MISC |
| https://github.com/wevm/mppx/commit/24ddcca719ae2… | x_refsource_MISC |
| https://github.com/wevm/mppx/releases/tag/mppx@0.8.2 | x_refsource_MISC |
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CVE-2026-63627 (GCVE-0-2026-63627)
Vulnerability from nvd – Published: 2026-09-22 19:07 – Updated: 2026-09-23 14:36
VLAI
EPSS
VEX
Title
mppx: Gas Draining with padding
Summary
mppx is a TypeScript interface for machine payments protocol. Prior to 0.8.2, FeePayerPolicy in src/tempo/internal/fee-payer.ts used decodeFunctionData to validate fee-sponsored calldata but did not reject trailing bytes. A client could append nonzero padding that increased intrinsic calldata gas while gas_limit and max_fee_per_gas remained within policy caps, causing the server fee_payer wallet to pay substantially more than the decoded transaction required. The tested 16 KB header limit bounded the demonstrated padding to about 5,500 bytes and produced approximately five times the normal transaction fee. This issue is fixed in version 0.8.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:15 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/wevm/mppx/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/wevm/mppx/pull/602 | x_refsource_MISC |
| https://github.com/wevm/mppx/commit/24ddcca719ae2… | x_refsource_MISC |
| https://github.com/wevm/mppx/releases/tag/mppx@0.8.2 | x_refsource_MISC |
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CVE-2026-34210 (GCVE-0-2026-34210)
Vulnerability from nvd – Published: 2026-03-31 14:10 – Updated: 2026-03-31 18:53
VLAI
EPSS
VEX
Title
mppx has Stripe charge credential replay via missing idempotency check
Summary
mppx is a TypeScript interface for machine payments protocol. Prior to version 0.4.11, the stripe/charge payment method did not check Stripe's Idempotent-Replayed response header when creating PaymentIntents. An attacker could replay a valid credential containing the same spt token against a new challenge, and the server would accept the replayed Stripe PaymentIntent as a new successful payment without actually charging the customer again. This allowed an attacker to pay once and consume unlimited resources by replaying the credential. This issue has been patched in version 0.4.11.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 18:50 UTC
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wevm/mppx/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/wevm/mppx/commit/b2b1a0b60506f… | x_refsource_MISC |
| https://github.com/wevm/mppx/releases/tag/mppx@0.4.11 | x_refsource_MISC |
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CVE-2026-34209 (GCVE-0-2026-34209)
Vulnerability from nvd – Published: 2026-03-31 14:10 – Updated: 2026-04-02 15:13
VLAI
EPSS
VEX
Title
mppx: Tempo has a session close voucher bypass vulnerability due to settled amount equality
Summary
mppx is a TypeScript interface for machine payments protocol. Prior to version 0.4.11, the tempo/session cooperative close handler validated the close voucher amount using "<" instead of "<=" against the on-chain settled amount. An attacker could submit a close voucher exactly equal to the settled amount, which would be accepted without committing any new funds, effectively closing or griefing the channel for free. This issue has been patched in version 0.4.11.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 15:13 UTC
CWE
- CWE-294 - Authentication Bypass by Capture-replay
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wevm/mppx/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/wevm/mppx/commit/94088246ee18f… | x_refsource_MISC |
| https://github.com/wevm/mppx/releases/tag/mppx@0.4.11 | x_refsource_MISC |
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CVE-2026-63628 (GCVE-0-2026-63628)
Vulnerability from cvelistv5 – Published: 2026-09-22 19:09 – Updated: 2026-09-24 14:17
VLAI
EPSS
VEX
Title
mppx: Gas Draining with access list
Summary
mppx is a TypeScript interface for machine payments protocol. Prior to 0.8.2, the fee-payer cosigning path in src/tempo/internal/fee-payer.ts copied a client-supplied access_list from a 0x78 FeePayerEnvelope without validating its length or contents. Because EIP-2930 access-list entries consume intrinsic gas even when the listed addresses are never used, a client could add fabricated address-only entries and cause the server fee_payer wallet to pay unnecessary transaction fees. The demonstrated 180-entry list remained within the 500,000 gas policy cap, 16 KB header limit, and RPC simulation budget while increasing the fee by approximately 9.4 times. This issue is fixed in version 0.8.2.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 14:17 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/wevm/mppx/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/wevm/mppx/pull/602 | x_refsource_MISC |
| https://github.com/wevm/mppx/commit/24ddcca719ae2… | x_refsource_MISC |
| https://github.com/wevm/mppx/releases/tag/mppx@0.8.2 | x_refsource_MISC |
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CVE-2026-63627 (GCVE-0-2026-63627)
Vulnerability from cvelistv5 – Published: 2026-09-22 19:07 – Updated: 2026-09-23 14:36
VLAI
EPSS
VEX
Title
mppx: Gas Draining with padding
Summary
mppx is a TypeScript interface for machine payments protocol. Prior to 0.8.2, FeePayerPolicy in src/tempo/internal/fee-payer.ts used decodeFunctionData to validate fee-sponsored calldata but did not reject trailing bytes. A client could append nonzero padding that increased intrinsic calldata gas while gas_limit and max_fee_per_gas remained within policy caps, causing the server fee_payer wallet to pay substantially more than the decoded transaction required. The tested 16 KB header limit bounded the demonstrated padding to about 5,500 bytes and produced approximately five times the normal transaction fee. This issue is fixed in version 0.8.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-23 14:15 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/wevm/mppx/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/wevm/mppx/pull/602 | x_refsource_MISC |
| https://github.com/wevm/mppx/commit/24ddcca719ae2… | x_refsource_MISC |
| https://github.com/wevm/mppx/releases/tag/mppx@0.8.2 | x_refsource_MISC |
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CVE-2026-34209 (GCVE-0-2026-34209)
Vulnerability from cvelistv5 – Published: 2026-03-31 14:10 – Updated: 2026-04-02 15:13
VLAI
EPSS
VEX
Title
mppx: Tempo has a session close voucher bypass vulnerability due to settled amount equality
Summary
mppx is a TypeScript interface for machine payments protocol. Prior to version 0.4.11, the tempo/session cooperative close handler validated the close voucher amount using "<" instead of "<=" against the on-chain settled amount. An attacker could submit a close voucher exactly equal to the settled amount, which would be accepted without committing any new funds, effectively closing or griefing the channel for free. This issue has been patched in version 0.4.11.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 15:13 UTC
CWE
- CWE-294 - Authentication Bypass by Capture-replay
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wevm/mppx/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/wevm/mppx/commit/94088246ee18f… | x_refsource_MISC |
| https://github.com/wevm/mppx/releases/tag/mppx@0.4.11 | x_refsource_MISC |
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CVE-2026-34210 (GCVE-0-2026-34210)
Vulnerability from cvelistv5 – Published: 2026-03-31 14:10 – Updated: 2026-03-31 18:53
VLAI
EPSS
VEX
Title
mppx has Stripe charge credential replay via missing idempotency check
Summary
mppx is a TypeScript interface for machine payments protocol. Prior to version 0.4.11, the stripe/charge payment method did not check Stripe's Idempotent-Replayed response header when creating PaymentIntents. An attacker could replay a valid credential containing the same spt token against a new challenge, and the server would accept the replayed Stripe PaymentIntent as a new successful payment without actually charging the customer again. This allowed an attacker to pay once and consume unlimited resources by replaying the credential. This issue has been patched in version 0.4.11.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 18:50 UTC
CWE
- CWE-697 - Incorrect Comparison
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wevm/mppx/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/wevm/mppx/commit/b2b1a0b60506f… | x_refsource_MISC |
| https://github.com/wevm/mppx/releases/tag/mppx@0.4.11 | x_refsource_MISC |
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