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Advisory record · GHSA-gvjc-3w7c-92jx

Zebra has sync restart poisoning from single unauthenticated peer via above-lookahead block

CVSS 5.3 MediumEPSS 0.0026 · 18th percentile

Published by the GitHub Advisory Database at 2 Jul 2026, 19:44 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
zebra-consensuscrates.io<7.0.07.0.0
zebradcrates.io<4.5.04.5.0
Identifiers
GHSA-gvjc-3w7c-92jx · CVE-2026-52737
Weakness (CWE)
CWE-345
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.

The zebrad crate before 4.5.0 and zebra-consensus before 7.0.0 are affected. A single unauthenticated peer can repeatedly force global sync restarts on a node that is syncing, each with a 67-second delay that cancels other in-flight downloads. Upgrade zebrad to 4.5.0 and zebra-consensus to 7.0.0.

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 0.0026, the 18th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 18 Aug 2026, 20:17 UTC Confirmed by NVD
  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.