Zebra has Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning
Zebra has Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning. A composite denial-of-service vulnerability in Zebra's block discovery pipeline allows an unauthenticated remote attacker to permanently halt all new block discovery on a targeted node.
Vuln-watch · relayed from the GitHub Advisory Database; see Source & attribution below
Summary
A composite denial-of-service vulnerability in Zebra's block discovery pipeline allows an unauthenticated remote attacker to permanently halt all new block discovery on a targeted node.
Affected
- zebrad (rust) < 4.4.0 — fixed in 4.4.0
Severity
High (CVSS 8.7), as rated by the upstream advisory.
Recommended actions
- Upgrade zebrad to 4.4.0 or later
Source & attribution
This 0xCERT advisory summarises GHSA-h9hm-m2xj-4rq9 / CVE-2026-44499 from the GitHub Advisory Database, credited upstream to upbqdn, mpguerra: https://github.com/advisories/GHSA-h9hm-m2xj-4rq9. Details may change; refer to the original source for the authoritative record.
References
OpenPGP-signed. The signed text of this advisory verifies against the 0xCERT key CCC7 D9EC 9415 723D.
Published 2026-05-08 · last updated 2026-10-08
curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0196/signed.txt | gpg --verify