CVE-2026-84700

HIGHPre-NVD 8.68.6—
EchelonGraph scoreHIGH confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-09-02. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.6
EG Score
8.6(high)
EG Risk
54(Track)
EG Risk 54/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity86% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 2, 2026

Advisory Details (4)

Auto-updated Sep 2, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

Pika Unauthenticated Replication Access via Internal Protobuf Port | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pika-unauthenticated-replication-access-via-internal-protobuf-port
generic🟡 PoC Available

Pika replication port accepts TrySync/DBSync/BinlogSync/RemoveSlaveNode with no authentication, exposing the live write stream (and full-sync snapshot) even when requirepass is configured · Issue #3270 · OpenAtomFoundation/pikiwidb · GitHub

https://github.com/OpenAtomFoundation/pikiwidb/issues/3270
generic

pikiwidb/src/pika_repl_server_conn.cc at v3.5.7 · OpenAtomFoundation/pikiwidb · GitHub

https://github.com/OpenAtomFoundation/pikiwidb/blob/v3.5.7/src/pika_repl_server_conn.cc
generic

GitHub - OpenAtomFoundation/pikiwidb: Pikiwidb is a Redis-Compatible database developed by Qihoo's infrastructure team. · GitHub

https://github.com/OpenAtomFoundation/pikiwidb

Vendor Advisories for CVE-2026-84700(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 74× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-21 03:40 UTCEG score recompute
  2. 2026-09-21 03:40 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-20 15:03 UTCGHSA enrichment
  5. 2026-09-20 02:26 UTCEG score recompute
  6. 2026-09-20 02:26 UTCGHSA enrichment
  7. 2026-09-19 13:50 UTCGHSA enrichment
  8. 2026-09-19 01:11 UTCEG score recompute
  9. 2026-09-19 01:11 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 12:34 UTCGHSA enrichment
  12. 2026-09-17 23:57 UTCEG score recompute
  13. 2026-09-17 23:57 UTCGHSA enrichment
  14. 2026-09-17 19:32 UTCEPSS rescore
  15. 2026-09-17 11:10 UTCGHSA enrichment
  16. 2026-09-16 22:33 UTCEG score recompute
  17. 2026-09-16 22:33 UTCGHSA enrichment
  18. 2026-09-16 14:09 UTCEPSS rescore
  19. 2026-09-16 09:32 UTCEG score recompute
  20. 2026-09-16 09:32 UTCGHSA enrichment
  21. 2026-09-16 05:15 UTCEPSS rescore
  22. 2026-09-15 20:53 UTCGHSA enrichment
  23. 2026-09-15 07:47 UTCEG score recompute
  24. 2026-09-15 07:47 UTCGHSA enrichment
  25. 2026-09-15 03:12 UTCEPSS rescore
Show 49 more
  1. 2026-09-15 03:12 UTCEPSS rescore
  2. 2026-09-14 19:10 UTCGHSA enrichment
  3. 2026-09-14 06:33 UTCGHSA enrichment
  4. 2026-09-13 17:57 UTCEG score recompute
  5. 2026-09-13 17:57 UTCGHSA enrichment
  6. 2026-09-13 05:20 UTCGHSA enrichment
  7. 2026-09-12 16:44 UTCEG score recompute
  8. 2026-09-12 16:44 UTCGHSA enrichment
  9. 2026-09-12 04:07 UTCGHSA enrichment
  10. 2026-09-11 15:31 UTCEG score recompute
  11. 2026-09-11 15:31 UTCGHSA enrichment
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 02:53 UTCGHSA enrichment
  15. 2026-09-10 14:16 UTCEG score recompute
  16. 2026-09-10 14:16 UTCGHSA enrichment
  17. 2026-09-10 01:39 UTCGHSA enrichment
  18. 2026-09-09 13:01 UTCGHSA enrichment
  19. 2026-09-09 00:23 UTCEG score recompute
  20. 2026-09-09 00:23 UTCGHSA enrichment
  21. 2026-09-08 22:01 UTCEPSS rescore
  22. 2026-09-08 11:19 UTCGHSA enrichment
  23. 2026-09-07 22:41 UTCEG score recompute
  24. 2026-09-07 22:41 UTCGHSA enrichment
  25. 2026-09-07 10:04 UTCGHSA enrichment
  26. 2026-09-06 21:24 UTCEG score recompute
  27. 2026-09-06 21:24 UTCGHSA enrichment
  28. 2026-09-06 13:48 UTCEPSS rescore
  29. 2026-09-06 08:44 UTCGHSA enrichment
  30. 2026-09-05 20:07 UTCEG score recompute
  31. 2026-09-05 20:07 UTCGHSA enrichment
  32. 2026-09-05 15:31 UTCEPSS rescore
  33. 2026-09-05 07:31 UTCGHSA enrichment
  34. 2026-09-04 18:55 UTCEG score recompute
  35. 2026-09-04 18:55 UTCGHSA enrichment
  36. 2026-09-04 06:19 UTCEG score recompute
  37. 2026-09-04 06:18 UTCGHSA enrichment
  38. 2026-09-04 05:07 UTCEPSS rescore
  39. 2026-09-03 17:39 UTCGHSA enrichment
  40. 2026-09-03 05:01 UTCEG score recompute
  41. 2026-09-03 05:00 UTCGHSA enrichment
  42. 2026-09-02 16:20 UTCEG score recompute
  43. 2026-09-02 16:20 UTCGHSA enrichment
  44. 2026-09-02 14:12 UTCEPSS rescore
  45. 2026-09-02 14:04 UTCEG score recompute
  46. 2026-09-02 14:04 UTCGHSA enrichment
  47. 2026-09-02 01:25 UTCEG score recompute
  48. 2026-09-02 01:12 UTCEG score recompute
  49. 2026-09-02 01:10 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84700?
CVE-2026-84700 is a high vulnerability published on September 2, 2026. 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…
When was CVE-2026-84700 disclosed?
CVE-2026-84700 was first published in the National Vulnerability Database on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84700 actively exploited?
CVE-2026-84700 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 70.9% of all scored CVEs.
What is the CVSS score of CVE-2026-84700?
CVE-2026-84700 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-84700?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84700, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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