FalkorDB: Authentication bypass in Bolt endpoint
Summary
FalkorDB before 4.20.0 contains an authentication bypass in the Bolt endpoint (src/bolt/bolt_api.c). The check that decides whether a password is required treats only a WRONGPASS error as a password requirement, so other Redis errors such as LOADING, MASTERDOWN or OOM cause the client to be treated as authenticated. A remote, unauthenticated attacker can then execute graph queries without credentials. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected.
Affected
- FalkorDB versions 0 to before 4.20.0
- Only deployments with the Bolt endpoint enabled (BOLT_PORT set)
Fixed in
- Upgrade to FalkorDB 4.20.0 or later. Bolt protocol support, including the affected code, was removed in 4.20.0.
Workaround
- Keep the Bolt endpoint disabled (do not set BOLT_PORT).
- If Bolt is required, restrict network access to the Bolt port to trusted clients only.
Exploitation
- CISA SSVC: exploitation none, not automatable, total technical impact.
- No evidence of exploitation in the wild found.
- Public proof of concept: Unknown.
Our recommendation
- Check whether BOLT_PORT is set on any FalkorDB instance.
- If Bolt is not needed, keep it disabled and verify the configuration.
- If Bolt is needed, block the Bolt port from untrusted networks until the upgrade is done.
- Upgrade FalkorDB to 4.20.0 or later.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- FalkorDB fix commit 0b11a00 github.com
- FalkorDB pull request #2170 github.com
- FalkorDB release v4.20.0 github.com
- OSV record CVE-2026-107910 osv.dev
- VulDB CVE-2026-107910 (entry 415719) vuldb.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 04:47.
Original description (NVD)
An improper authentication vulnerability in the is_authenticated function (src/bolt/bolt_api.c) in FalkorDB before 4.20.0 allows a remote unauthenticated attacker to execute graph queries without credentials through the Bolt endpoint. The function decides whether a password is required by issuing an empty AUTH command to Redis and treats only a WRONGPASS error as meaning that a password is required; any other error, such as LOADING while a dataset is being loaded, MASTERDOWN during replication failover, or OOM under memory pressure, causes the client to be treated as authenticated. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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