CVE-2026-34209 | wevm mppx up to 0.4.10 authentication replay

VDB-354397 · CVE-2026-34209 · GCVE-0-2026-34209 WEVM MPPX UP TO 0.4.10 AUTHENTICATION REPLAY HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.2 $0-$5k 1.86+ Summaryinfo A vulnerability, which was classified as critical, has been found in wevm mppx up to 0.4.10. Affected is an unknown function. This manipulation causes authentication replay. This vulnerability is tracked as CVE-2026-34209. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component. Detailsinfo A vulnerability has been found in wevm mppx up to 0.4.10 and classified as critical. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a authentication replay vulnerability. The CWE definition for the vulnerability is CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is: 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. The advisory is shared at github.com. This vulnerability is known as CVE-2026-34209 since 03/26/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1040 for this issue. Upgrading to version 0.4.11 eliminates this vulnerability. Productinfo Vendor wevm Name mppx Version 0.4.0 0.4.1 0.4.2 0.4.3 0.4.4 0.4.5 0.4.6 0.4.7 0.4.8 0.4.9 0.4.10 Website Product: https://github.com/wevm/mppx/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.4 VulDB Meta Temp Score: 7.2 VulDB Base Score: 7.3 VulDB Temp Score: 7.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.5 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Authentication replay CWE: CWE-294 / CWE-287 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: mppx 0.4.11 Timelineinfo 03/26/2026 CVE reserved 03/31/2026 +4 days Advisory disclosed 03/31/2026 +0 days VulDB entry created 03/31/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-34209 (🔒) GCVE (CVE): GCVE-0-2026-34209 GCVE (VulDB): GCVE-100-354397 Entryinfo Created: 03/31/2026 16:58 Changes: 03/31/2026 16:58 (63) Complete: 🔍 Cache ID: 99:32E:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸