Vulnerability-Lookup

GHSA-747H-6GH8-P8V2

Vulnerability from github – Published: 2026-09-02 03:31 – Updated: 2026-09-02 03:31

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.

Severity

8.6 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

8.8 (High)


                  
                    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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-84700"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-02T01:17:25Z",
    "severity": "HIGH"
  },
  "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 \u2014 a slave presents it as masterauth inside its MetaSync request \u2014 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.",
  "id": "GHSA-747h-6gh8-p8v2",
  "modified": "2026-09-02T03:31:12Z",
  "published": "2026-09-02T03:31:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84700"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenAtomFoundation/pikiwidb/issues/3270"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenAtomFoundation/pikiwidb"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OpenAtomFoundation/pikiwidb/blob/v3.5.7/src/pika_repl_server_conn.cc"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/pika-unauthenticated-replication-access-via-internal-protobuf-port"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-84700 (GCVE-0-2026-84700)

Vulnerability from cvelistv5 – Published: 2026-09-02 00:37 – Updated: 2026-09-02 16:01

Title

Pika Unauthenticated Replication Access via Internal Protobuf Port

Summary

Severity

8.8 (High)


                        
                          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

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-02 13:43 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/OpenAtomFoundation/pikiwidb	product
https://github.com/OpenAtomFoundation/pikiwidb/is…	issue-tracking
https://github.com/OpenAtomFoundation/pikiwidb/bl…	technical-description
https://www.vulncheck.com/advisories/pika-unauthe…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
OpenAtomFoundation	pikiwidb	Affected: 0 , ≤ 4.0.4-alpha (custom)

Date Public

2026-07-17 00:00

Credits

George Chen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-84700",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-02T13:43:55.314863Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-02T16:01:31.813Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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          "repo": "https://github.com/OpenAtomFoundation/pikiwidb",
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      "credits": [
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          "lang": "en",
          "type": "finder",
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      "datePublic": "2026-07-17T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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 \u2014 a slave presents it as masterauth inside its MetaSync request \u2014 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."
        }
      ],
      "metrics": [
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            "vulnIntegrityImpact": "LOW"
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      "providerMetadata": {
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      "references": [
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          "tags": [
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          "url": "https://github.com/OpenAtomFoundation/pikiwidb"
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        {
          "tags": [
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          ],
          "url": "https://github.com/OpenAtomFoundation/pikiwidb/issues/3270"
        },
        {
          "tags": [
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          "url": "https://github.com/OpenAtomFoundation/pikiwidb/blob/v3.5.7/src/pika_repl_server_conn.cc"
        },
        {
          "name": "VulnCheck Advisory: Pika Unauthenticated Replication Access via Internal Protobuf Port",
          "tags": [
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          ],
          "url": "https://www.vulncheck.com/advisories/pika-unauthenticated-replication-access-via-internal-protobuf-port"
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      ],
      "title": "Pika Unauthenticated Replication Access via Internal Protobuf Port",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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    "datePublished": "2026-09-02T00:37:55.082Z",
    "dateReserved": "2026-09-01T23:24:28.318Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-747H-6GH8-P8V2

CVE-2026-84700 (GCVE-0-2026-84700)

Tags

Sightings

Nomenclature