CVE-2026-84700

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Source
https://cve.org/CVERecord?id=CVE-2026-84700
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84700.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-84700
Published
2026-09-02T00:37:55Z
Modified
2026-09-04T03:47:28Z
Severity
  • 8.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Pika Unauthenticated Replication Access via Internal Protobuf Port
Details

PikiwiDB (Pika) v3.5.7 exposes an internal protobuf replication server on a port derived from the client port plus 2000 (e.g. 11221 when the default client port 9221 is used) that does not authenticate incoming requests. Although requirepass is intended to gate replication — a slave presents it as masterauth inside its MetaSync request — only the MetaSync handler (HandleMetaSyncRequest) validates it; the frame dispatcher (DealMessage) does not require a completed or attempted MetaSync before routing other message types to their handlers. As a result, an unauthenticated remote attacker can connect directly to the replication port and issue TrySync, DBSync, BinlogSync, and RemoveSlaveNode requests, obtaining the full-sync snapshot and live write stream and removing replica nodes, even when requirepass is configured.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84700.json"
}
References

Affected packages

Git / github.com/openatomfoundation/pikiwidb

Affected ranges

Type
GIT
Repo
https://github.com/openatomfoundation/pikiwidb
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
54693ce5882f89590e3e1357605deaa1e4521102
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "4.0.4-alpha"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

1.*
1.0.0
4.*
4.0.4
v1.*
v1.0.2
v1.0.3
v2.*
v2.0.0
v2.0.2
v2.0.3
v2.0.4
v2.0.5
v2.1.0
v2.1.1
v2.1.2
v2.1.3
v2.1.4
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.3.0
v2.3.1
v2.3.2
v2.3.3
v2.3.4
v2.3.5
v2.3.6
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.0.4
v3.0.5
v3.0.6
v3.0.7
v3.0.8
v3.0.9
v3.1.0
v3.1.1
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.2.5
v3.2.6
v3.2.7
v3.2.8
v3.2.9
v3.3.0
v3.3.1
v3.3.2
v3.3.3
v3.3.4
v3.3.5
v3.3.6
v3.4.0
v3.4.1
v3.5.1
v4.*
v4.0.2
v4.0.2-alpha
v4.0.4-alpha

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84700.json"