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Advisory record · GHSA-65jj-fmw8-468q

zebrad has unbounded memory leak in mempool download pipeline via timeout path cancel_handles retention

CVSS 5.3 MediumEPSS 0.0051 · 43rd percentile

Published by the GitHub Advisory Database at 2 Jul 2026, 20:12 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-65jj-fmw8-468q · CVE-2026-52734
Weakness (CWE)
CWE-401
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.

GHSA-65jj-fmw8-468q: zebrad versions before 4.5.0 have an unbounded memory leak in the mempool download pipeline, where entries for transactions whose verification times out are never removed. A remote peer able to connect to a node that accepts inbound P2P connections, which is the default, can send transactions to cause gradual memory growth that may eventually exhaust memory and terminate the process. Upgrade to zebrad 4.5.0. No configuration workaround is listed; restarting the node clears the accumulated entries.

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, 20:12 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.