Improper Validation of Unsafe Equivalence in Input in ZenHive mpp allows an unauthenticated remote client to pass the Tempo duplicate-submission gate twice with one signed transaction. MPP.Methods.T…
Info
Summary
Improper Validation of Unsafe Equivalence in Input in ZenHive mpp allows an unauthenticated remote client to pass the Tempo duplicate-submission gate twice with one signed transaction. MPP.Methods.Tempo reserves the pre-broadcast dedup slot on the caller-supplied hex in reserve_hash_atomic/2, keyed through store_key/1 on tx.raw rather than on a canonical form of the transaction. The deserializer stores the caller's hex verbatim and accepts both recovery-id encodings, so one signed transaction …
In-depth triage
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Sources
- NVD DATABASE
Original Links
- https://cna.erlef.org/cves/CVE-2026-88255.html
- https://github.com/ZenHive/mpp/commit/e12bd4a1cea2e97c2a01fc059c48e5594a7b4a43
- https://github.com/ZenHive/mpp/commit/f8904666061fbab695874856d8fcd02c471dfe1b
- https://github.com/ZenHive/mpp/security/advisories/GHSA-8x7x-5j8g-8hcx
- https://osv.dev/vulnerability/EEF-CVE-2026-88255
Timeline
- nvd_ingest NVD