How many CVEs have patched check_hash_unused?

2 published CVEs changed check_hash_unused in ZenHive/mpp, in 2 distinct patches totalling 71 changed lines, between 2026 and 2026.

What is the latest CVE that changed check_hash_unused?

CVE-2026-88255 (mpp Tempo keys its pre-broadcast dedup reserve on the caller-supplied transaction encoding, so a re-encoded signed transaction reserves a second slot), published 2026-09-16, changed lines 1156 to 1159 of lib/mpp/methods/tempo.ex.

How does check_hash_unused compare to the rest of ZenHive/mpp?

ZenHive/mpp has 13 CVEs with a located fix in total; 2 of them changed check_hash_unused.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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ZenHive/mpp

Function

2 files

check_hash_unused

Name: check_hash_unused in ZenHive/mpp: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

Defined in 2 files

Last patched September 16, 2026

2

CVEs

That changed this function

2

Distinct patches

Backports counted once

71

Lines changed

Added plus removed

2026

Years

By CVE publication date

Overview

check_hash_unused in ZenHive/mpp was changed by 2 published CVE fixes in 2026, in 2 distinct patches that added or removed 71 lines in total.

The name occurs in 2 files: lib/mpp/methods/tempo.ex, lib/mpp/methods/evm.ex.

ZenHive/mpp has 13 CVEs with a located fix in total, so 15% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed check_hash_unused, newest first, with the lines each fix touched.

mpp Tempo keys its pre-broadcast dedup reserve on the caller-supplied transaction encoding, so a re-encoded signed transaction reserves a second slot
CVE-2026-88255 · lib/mpp/methods/tempo.ex · lines 1156–1159 · +3 −2
Medium · CVSS 6.3
EPSS 0.5%2026-09-16
On-chain transfer proof is not single-use in mpp EVM payment method, enabling cross-challenge replay
CVE-2026-67581 · lib/mpp/methods/evm.ex · lines 331–396 · +66 −0
High · CVSS 8.7
EPSS 0.6%2026-08-19

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Other functions in these files

Functions in the same files that CVE fixes also changed.

Other hotspots in the repository

Functions in ZenHive/mpp changed by the most CVE fixes.

maybe_validate_fee_payer_economics3 CVEs · lib/mpp/methods/tempo.ex non_neg_integer3 CVEs · lib/mpp/methods/tempo/fee_payer_policy.ex map2 CVEs · lib/mpp/plug.ex verify2 CVEs · lib/mpp/methods/tempo.ex validate_intent2 CVEs · lib/mpp/plug.ex intent_name2 CVEs · lib/mpp/plug.ex

All patched functions in ZenHive/mpp

Frequently asked questions

Common questions about CVE fixes to check_hash_unused.

How many CVEs have patched check_hash_unused?: 2 published CVEs changed check_hash_unused in ZenHive/mpp, in 2 distinct patches totalling 71 changed lines, between 2026 and 2026.
What is the latest CVE that changed check_hash_unused?: CVE-2026-88255 (mpp Tempo keys its pre-broadcast dedup reserve on the caller-supplied transaction encoding, so a re-encoded signed transaction reserves a second slot), published 2026-09-16, changed lines 1156 to 1159 of lib/mpp/methods/tempo.ex.
How does check_hash_unused compare to the rest of ZenHive/mpp?: ZenHive/mpp has 13 CVEs with a located fix in total; 2 of them changed check_hash_unused.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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