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TI-2026-69850 Aliases CVE-2026-107908

Heap out-of-bounds write in FalkorDB Bolt RESET handler

Priority MEDIUM 49CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

FalkorDB before 4.20.0 has a heap-based out-of-bounds write in the BoltReadHandler function (CWE-787). Release builds compile out the only size check, an ASSERT(), so the handler moves buffered data backwards past the read buffer. A remote unauthenticated attacker can cause a denial of service and possibly execute arbitrary code by sending a crafted Bolt RESET message. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A heap-based out-of-bounds write in the BoltReadHandler function (src/bolt/bolt_api.c) in FalkorDB before 4.20.0 allows a remote unauthenticated attacker to cause a denial of service and possibly execute arbitrary code by sending a Bolt RESET message with an attacker-chosen chunk size to the Bolt port. The handler checks the size only with ASSERT(), which is compiled out in release builds, then computes a destination pointer from the wire-supplied 16-bit size and moves buffered data up to about 64 KiB backwards past the start of the read buffer. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00595 48th percentileScored 2026-11-07
Fix Fixed FalkorDB (FalkorDB): 4.20.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FalkorDBFalkorDBbefore 4.20.04.20.0Patch availableCNA
  • FalkorDB VendorFalkorDB Affected before 4.20.0 Fixed in 4.20.0 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*——FalkorDB
  • cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:* Versions — — ·FalkorDB

Remediation

Upgrade FalkorDB to 4.20.0, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA FalkorDB (FalkorDB) Fixed in 4.20.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    FalkorDB 4.20.0

    4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-69851 Out-of-bounds write in FalkorDB Bolt WebSocket frame handlingPriority MEDIUM 46
    • TI-2026-69852 Authentication bypass in FalkorDB Bolt endpointPriority MEDIUM 42
    • TI-2026-69853 Type confusion in FalkorDB GRAPH.QUERY via the --bolt argumentPriority LOW 36
    Show all 4 records →

Timeline

  1. 2026-10-09 Threatist record created from CVE-2026-107908
  2. 2026-10-16 CISA SSVC decision points changed

References

Patch 2

Other 1

  • TI-2026-05312 Unauthenticated Path Traversal in FalkorDB Browser Leads to Remote Code Execution CVSS 3.1CRITICAL 9.8
  • TI-2026-69847 Double free and use-after-free in FalkorDB RDB loading CVSS 4.0CRITICAL 9.3
  • TI-2026-69851 Out-of-bounds write in FalkorDB Bolt WebSocket frame handling CVSS 4.0HIGH 8.8
  • TI-2026-08883 QueryWeaver Authentication Bypass via Email Signup Token Issuance for Existing Accounts CVSS 4.0HIGH 8.8
  • TI-2026-69848 Heap out-of-bounds read in FalkorDB via crafted RDB stream CVSS 4.0HIGH 8.8
  • TI-2026-69852 Authentication bypass in FalkorDB Bolt endpoint CVSS 4.0CRITICAL 9.2
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences