CVE-2026-86227

LOWPre-NVD 3.13.1—
EchelonGraph scoreHIGH confidence

Score 3.1 from GitHub Security Advisory (severity: LOW) published 2026-09-07. a secondary CVSS source baseline 3.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
3.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 3.1Exploit: Elevated riskExposed: 0

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

A weakness has been identified in valkey-io valkey up to 9.0.5/9.1.1. This affects the function kvstoreGetHashtable of the file src/kvstore.c. This manipulation of the argument didx causes out-of-bounds read. It is possible to initiate the attack remotely. The attack is considered to have high complexity. It is indicated that the exploitability is difficult. The exploit has been made available to the public and could be used for attacks. Patch name: 4691888e7fab3df128f0bde5750c9fde2ae552fa. To fix this issue, it is recommended to deploy a patch. Exploitation requires cluster mode plus attacker-controlled dump.rdb at startup (data-dir write access, replication feed, or a stored crafted RDB) - an attacker-position DoS at boot, not network pre-auth. The issue report was closed stating it "is worth fixing for the sake of memory safety… but I don't think it meets our bar for a security disclosure."

CVSS v3
3.1
EG Score
3.1(high)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity31% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

September 6, 2026

Last Modified

September 9, 2026

References (9)

Vendor Advisories for CVE-2026-86227(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
valkey8.1.1+dfsg1-3 ... 9.1.1-1 (6 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
valkey8.1.1+dfsg1-3, 8.1.4+dfsg1-1, 8.1.4+dfsg1-2, 9.1.1-1——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 36× 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. 2026-09-24 14:04 UTCEPSS rescore
  2. 2026-09-24 08:39 UTCEG score recompute
  3. 2026-09-24 08:39 UTCGHSA enrichment
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-22 16:01 UTCEPSS rescore
  6. 2026-09-21 21:09 UTCEPSS rescore
  7. 2026-09-21 10:01 UTCEG score recompute
  8. 2026-09-21 10:01 UTCGHSA enrichment
  9. 2026-09-20 20:16 UTCEPSS rescore
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 11:24 UTCEG score recompute
  12. 2026-09-18 11:24 UTCGHSA enrichment
  13. 2026-09-17 19:32 UTCEPSS rescore
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 12:46 UTCEG score recompute
  17. 2026-09-15 12:46 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-12 14:09 UTCEG score recompute
  21. 2026-09-12 14:09 UTCGHSA enrichment
  22. 2026-09-11 14:53 UTCEPSS rescore
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-09 15:32 UTCEG score recompute
  25. 2026-09-09 15:31 UTCGHSA enrichment
Show 11 more
  1. 2026-09-09 15:26 UTCNVD updateCVSS v4 → 1.3
  2. 2026-09-09 14:21 UTCEG score recompute
  3. 2026-09-09 14:21 UTCGHSA enrichment
  4. 2026-09-09 14:20 UTCMITRE cvelistV5CVSS v4 → 2.3
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-08 14:08 UTCEG score recompute
  7. 2026-09-08 14:07 UTCGHSA enrichment
  8. 2026-09-06 23:33 UTCEG score recompute
  9. 2026-09-06 23:32 UTCNVD updateCVSS v4 → 1.3
  10. 2026-09-06 22:23 UTCEG score recompute
  11. 2026-09-06 22:23 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-86227?
CVE-2026-86227 is a low vulnerability published on September 6, 2026. A weakness has been identified in valkey-io valkey up to 9.0.5/9.1.1. This affects the function kvstoreGetHashtable of the file src/kvstore.c. This manipulation of the argument didx causes out-of-bounds read. It is possible to initiate the attack remotely. The attack is considered to have high…
When was CVE-2026-86227 disclosed?
CVE-2026-86227 was first published in the National Vulnerability Database on September 6, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86227 actively exploited?
CVE-2026-86227 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.1% of all scored CVEs.
What is the CVSS score of CVE-2026-86227?
CVE-2026-86227 has a CVSS v3 base score of 3.1 (NVD).
How do I remediate CVE-2026-86227?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86227, 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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