A heap-based out-of-bounds read in the BufferSerializerIOv2_ReadBuffer function (src/serializers/serializer_io.c) in FalkorDB before 4.18.4 allows a remote attacker who can issue Redis replication commands (for example, against an instance with no password configured) to cause a denial of service or disclose heap memory by supplying a crafted RDB stream whose sub-buffer length field exceeds the remaining buffer size. The only bounds check is an ASSERT(), which is compiled out in release builds, so memcpy() reads past the end of the heap allocation.
CVE-2026-7826
CRITICALPre-NVD 9.19.1—Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
Score 9.1 from GitHub Security Advisory (severity: HIGH) published 2026-10-09. A secondary CVSS source baseline 9.1; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.1Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 9.1
- EG Score
- 9.1CRITICALhigh confidence
- EG Risk
- 46EG Risk 46/100CISA SSVC
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 computedSeverity91% × 45%Exploitation0% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.4%
- EPSS %ILE
- 35th
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 9, 2026
Last Modified
October 9, 2026
Advisory Details (3)
Auto-updated Oct 9, 2026Patch available. Sources: github_pr, github_commit, github_release.
github_release Patch Available
v4.18.4
Patch available: FalkorDB/FalkorDB v4.18.4
https://github.com/FalkorDB/FalkorDB/releases/tag/v4.18.4github_commit
commit 55d986f45ecd (FalkorDB/FalkorDB)
Fix landed in FalkorDB/FalkorDB commit 55d986f45ecd — awaiting tagged release
https://github.com/FalkorDB/FalkorDB/commit/55d986f45ecd5d80f7a9e5e138e8b0f96535b48cgithub_pr
fix(serializer): add runtime bounds checks in BufferSerializerIOv2_ReadBuffer
Fix merged in FalkorDB/FalkorDB PR #1972 on 2026-05-07 — awaiting tagged release
https://github.com/FalkorDB/FalkorDB/pull/1972Vendor Advisories for CVE-2026-7826(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 11× in last 7d / 11× 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.
- 2026-10-10 03:13 UTCGHSA enrichment
- 2026-10-09 22:52 UTCEG score recompute
- 2026-10-09 22:51 UTCGHSA enrichment
- 2026-10-09 20:07 UTCEPSS rescore
- 2026-10-09 18:30 UTCGHSA enrichment
- 2026-10-09 14:08 UTCGHSA enrichment
- 2026-10-09 09:48 UTCEG score recompute
- 2026-10-09 09:47 UTCGHSA enrichment
- 2026-10-09 05:26 UTCEG score recompute
- 2026-10-09 04:33 UTCEG score recompute
- 2026-10-09 04:33 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-7826?
CVE-2026-7826 is a critical vulnerability published on October 9, 2026. A heap-based out-of-bounds read in the BufferSerializerIOv2ReadBuffer function (src/serializers/serializerio.c) in FalkorDB before 4.18.4 allows a remote attacker who can issue Redis replication commands (for example, against an instance with no password configured) to cause a denial of service or…
When was CVE-2026-7826 disclosed?
CVE-2026-7826 was first published on October 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7826 actively exploited?
CVE-2026-7826 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-7826?
CVE-2026-7826 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-7826?
A fix for CVE-2026-7826 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-7826 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-7826
Is Your Infrastructure Affected by CVE-2026-7826?
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