Zebra's Block Validator Undercounts Coinbase and P2SH Sigops
Zebra's Block Validator Undercounts Coinbase and P2SH Sigops. Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit (MAXBLOCKSIGOPS), allowing it to accept blocks that zcashd rejects with bad-blk-sigops.
Vuln-watch · relayed from the GitHub Advisory Database; see Source & attribution below
Summary
Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit (MAXBLOCKSIGOPS), allowing it to accept blocks that zcashd rejects with bad-blk-sigops.
Affected
- zebrad (rust) < 4.4.0 — fixed in 4.4.0
Severity
Critical (CVSS 9.2), as rated by the upstream advisory.
Recommended actions
- Upgrade zebrad to 4.4.0 or later
Source & attribution
This 0xCERT advisory summarises GHSA-jv4h-j224-23cc / CVE-2026-44498 from the GitHub Advisory Database, credited upstream to sangsoo-osec, upbqdn, mpguerra, defuse: https://github.com/advisories/GHSA-jv4h-j224-23cc. 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 2026-05-07 · last updated 2026-10-08
curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0191/signed.txt | gpg --verify