CVE-2026-109366

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-109366
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109366.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-109366
Aliases
  • GHSA-4f6v-mj46-gxg3
Published
2026-10-12T16:05:43Z
Modified
2026-10-13T02:46:59Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Zebra before 6.4.0 Gossiped Block Drop via Forged Coinbase scriptSig Height
Details

Zebra before 6.4.0 contains an improper integrity validation vulnerability in the inbound gossip download path that allows unauthenticated peers to force dropping of new blocks without penalty. Attackers can serve a real block with a coinbase scriptSig rewritten to height 1, which keeps the ZIP-244 block hash, triggering a behind-tip drop before consensus validation and delaying tip discovery for mining backends.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-354"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109366.json"
}
References

Affected packages

Git / github.com/zcashfoundation/zebra

Affected ranges

Type
GIT
Repo
https://github.com/zcashfoundation/zebra
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
aedb094dc6dd13a0a565947e7ab4466a8b149d39
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "6.4.0"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

4.*
4.3.1
tower-batch-control-v1.*
tower-batch-control-v1.1.0
tower-batch-control-v1.1.1
tower-fallback-v0.*
tower-fallback-v0.2.42
tower-fallback-v0.2.43
v1.*
v1.0.0
v1.0.0-alpha.0
v1.0.0-alpha.1
v1.0.0-alpha.10
v1.0.0-alpha.11
v1.0.0-alpha.12
v1.0.0-alpha.13
v1.0.0-alpha.14
v1.0.0-alpha.15
v1.0.0-alpha.16
v1.0.0-alpha.17
v1.0.0-alpha.18
v1.0.0-alpha.19
v1.0.0-alpha.2
v1.0.0-alpha.3
v1.0.0-alpha.4
v1.0.0-alpha.5
v1.0.0-alpha.6
v1.0.0-alpha.7
v1.0.0-alpha.8
v1.0.0-alpha.9
v1.0.0-beta.0
v1.0.0-beta.1
v1.0.0-beta.10
v1.0.0-beta.11
v1.0.0-beta.12
v1.0.0-beta.13
v1.0.0-beta.14
v1.0.0-beta.15
v1.0.0-beta.2
v1.0.0-beta.3
v1.0.0-beta.4
v1.0.0-beta.5
v1.0.0-beta.6
v1.0.0-beta.7
v1.0.0-beta.8
v1.0.0-beta.9
v1.0.0-rc.0
v1.0.0-rc.1
v1.0.0-rc.2
v1.0.0-rc.3
v1.0.0-rc.4
v1.0.0-rc.5
v1.0.0-rc.6
v1.0.0-rc.7
v1.0.0-rc.8
v1.0.0-rc.9
v1.0.1
v1.1.0
v1.2.0
v1.3.0
v1.4.0
v1.5.0
v1.5.1
v1.5.2
v1.6.0
v1.6.1
v1.7.0
v1.8.0
v1.9.0
v2.*
v2.0.0
v2.0.0-rc.0
v2.0.1
v2.1.0
v2.2.0
v2.3.0
v2.4.0
v2.4.2
v2.5.0
v3.*
v3.0.0
v3.0.0-rc.0
v3.1.0
v4.*
v4.0.0
v4.1.0
v4.2.0
v4.3.0
v4.3.1
v4.4.0
v4.4.1
v4.5.0
v4.5.1
v5.*
v5.0.0
v5.1.0
v5.1.1
v5.2.0
v6.*
v6.0.0
v6.0.0-rc.0
v6.1.0
v6.2.0
v6.2.1
v6.2.2
v6.2.3
v6.3.0
zebra-chain-v11.*
zebra-chain-v11.1.0
zebra-chain-v11.2.0
zebra-chain-v11.3.0
zebra-chain-v12.*
zebra-chain-v12.0.0
zebra-consensus-v11.*
zebra-consensus-v11.0.0
zebra-consensus-v12.*
zebra-consensus-v12.0.0
zebra-consensus-v12.0.1
zebra-consensus-v13.*
zebra-consensus-v13.0.0
zebra-consensus-v14.*
zebra-consensus-v14.0.0
zebra-consensus-v14.0.1
zebra-consensus-v15.*
zebra-consensus-v15.0.0
zebra-network-v10.*
zebra-network-v10.1.0
zebra-network-v10.1.1
zebra-network-v10.2.0
zebra-network-v10.2.1
zebra-network-v11.*
zebra-network-v11.0.0
zebra-network-v12.*
zebra-network-v12.0.0
zebra-node-services-v10.*
zebra-node-services-v10.0.0
zebra-node-services-v9.*
zebra-node-services-v9.1.0
zebra-node-services-v9.1.1
zebra-node-services-v9.1.2
zebra-rpc-v11.*
zebra-rpc-v11.1.0
zebra-rpc-v12.*
zebra-rpc-v12.0.0
zebra-rpc-v13.*
zebra-rpc-v13.0.0
zebra-rpc-v14.*
zebra-rpc-v14.0.0
zebra-rpc-v15.*
zebra-rpc-v15.0.0
zebra-rpc-v16.*
zebra-rpc-v16.0.0
zebra-script-v10.*
zebra-script-v10.1.0
zebra-script-v10.1.1
zebra-script-v10.1.2
zebra-script-v11.*
zebra-script-v11.0.0
zebra-state-v10.*
zebra-state-v10.1.0
zebra-state-v11.*
zebra-state-v11.0.0
zebra-state-v11.1.0
zebra-state-v11.1.1
zebra-state-v12.*
zebra-state-v12.0.0
zebra-state-v12.0.1
zebra-state-v13.*
zebra-state-v13.0.0
zebra-utils-v10.*
zebra-utils-v10.0.0
zebra-utils-v10.0.1
zebra-utils-v9.*
zebra-utils-v9.1.0
zebra-utils-v9.1.1
zebra-utils-v9.1.3
zebra-utils-v9.1.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109366.json"