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Advisory record · GHSA-4fc2-h7jh-287c

zebrad has mempool transaction admission denial via single-peer inbound queue saturation

CVSS 5.3 MediumEPSS 0.0051 · 43rd percentile

Published by the GitHub Advisory Database at 2 Jul 2026, 19:39 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
zebradcrates.io<4.5.04.5.0
Identifiers
GHSA-4fc2-h7jh-287c · CVE-2026-52732
Weakness (CWE)
CWE-770
Tags
Published
2 Jul 2026
Updated
2 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Zebrad versions before 4.5.0 are vulnerable, including all default configurations up to and including v4.4.1. A single unauthenticated peer connecting over the P2P network can advertise fake transaction IDs to occupy all 25 mempool download slots, causing other peers' transactions and local RPC submissions to be rejected while the attack continues. Upgrade to zebrad 4.5.0. No complete configuration workaround exists.

Written 8 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0051, the 43rd percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 2 Jul 2026, 19:39 UTC Confirmed by GitHub Advisory Database
  2. 31 Oct 2026, 15:18 UTC First seen by agentprime
  3. 31 Oct 2026, 15:18 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.