zebrad has unbounded memory leak in mempool download pipeline via timeout path cancel_handles retention
zebrad has unbounded memory leak in mempool download pipeline via timeout path cancel_handles retention. You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections (network.listenaddr is set, which is the default).
Vuln-watch · relayed from the GitHub Advisory Database; see Source & attribution below
Summary
You are affected if: 1. You run zebrad up to and including v4.4.1. 2. Your node accepts inbound P2P connections (network.listenaddr is set, which is the default).
Affected
- zebrad (rust) <= 4.4.1 — fixed in 4.5.0
Severity
Medium, as rated by the upstream advisory.
Recommended actions
- Upgrade zebrad to 4.5.0 or later
Source & attribution
This 0xCERT advisory summarises GHSA-65jj-fmw8-468q / CVE-2026-52734 from the GitHub Advisory Database, credited upstream to AnticsDecoded, mpguerra: https://github.com/advisories/GHSA-65jj-fmw8-468q. Details may change; refer to the original source for the authoritative record.
References
- https://github.com/advisories/GHSA-65jj-fmw8-468q
- CVE-2026-52734
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-65jj-fmw8-468q
- https://github.com/ZcashFoundation/zebra/blob/d4cd662c716382f6397d2a730148025a1ca79fec/zebrad/src/components/mempool.rs#L663-L672
- https://github.com/ZcashFoundation/zebra/blob/d4cd662c716382f6397d2a730148025a1ca79fec/zebrad/src/components/mempool/downloads.rs#L215-L228
OpenPGP-signed. The signed text of this advisory verifies against the 0xCERT key CCC7 D9EC 9415 723D.
Published 2026-07-02 · last updated 2026-10-08
curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0210/signed.txt | gpg --verify