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0xCERT Security Advisory 0xCERT-2026-0192
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Advisory-ID:  0xCERT-2026-0192
Severity:     Medium
Published:    2026-05-07T20:55:28.000Z
Updated:      2026-10-08T22:47:29.486Z
Chains:       n/a
URL:          https://www.0xcert.com/advisory/0xCERT-2026-0192

Title: Zebra Vulnerable to Allocation Amplification in Inbound Network Deserializers

Summary
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Zebra Vulnerable to Allocation Amplification in Inbound Network Deserializers. Several inbound deserialization paths in Zebra allocated buffers sized against generic transport or block-size ceilings before the tighter protocol or consensus limits were enforced.

Details
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Summary
Several inbound deserialization paths in Zebra allocated buffers sized against generic transport or block-size ceilings before the tighter protocol or consensus limits were enforced.

Affected
- - zebra-network (rust) <= 5.0.2 — fixed in 6.0.0
- - zebrad (rust) < 4.4.0 — fixed in 4.4.0
- - zebra-chain (rust) <= 6.0.3 — fixed in 7.0.0

Severity
Medium, as rated by the upstream advisory.

Recommended actions
- - Upgrade zebra-network to 6.0.0 or later
- - Upgrade zebrad to 4.4.0 or later
- - Upgrade zebra-chain to 7.0.0 or later

Source & attribution
This 0xCERT advisory summarises GHSA-438q-jx8f-cccv / CVE-2026-44500 from the GitHub Advisory Database, credited upstream to Zk-nd3r: https://github.com/advisories/GHSA-438q-jx8f-cccv. Details may change; refer to the original source for the authoritative record.

References
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- - https://github.com/advisories/GHSA-438q-jx8f-cccv
- - CVE-2026-44500
- - https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-438q-jx8f-cccv
- - https://github.com/ZcashFoundation/zebra/releases/tag/v4.4.0
- - https://nvd.nist.gov/vuln/detail/CVE-2026-44500

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