{"id":"CVE-2026-107908","published":"2026-10-09T06:17:10.777","lastModified":"2026-10-09T06:17:12.243","description":"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.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-787"],"vendors":[],"products":[],"references":[{"url":"https://github.com/FalkorDB/FalkorDB/commit/0b11a00b34b25c4d4fdfe55f0a35c8a00593bd7d","tags":[]},{"url":"https://github.com/FalkorDB/FalkorDB/pull/2170","tags":[]},{"url":"https://github.com/FalkorDB/FalkorDB/releases/tag/v4.20.0","tags":[]}],"exploitRefs":[{"url":"https://github.com/FalkorDB/FalkorDB/commit/0b11a00b34b25c4d4fdfe55f0a35c8a00593bd7d","tags":[]},{"url":"https://github.com/FalkorDB/FalkorDB/pull/2170","tags":[]},{"url":"https://github.com/FalkorDB/FalkorDB/releases/tag/v4.20.0","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw involves a heap-based out-of-bounds write in FalkorDB, allowing remote unauthenticated attackers to potentially execute arbitrary code or cause a denial of service.","exploitability":"Exploitation is moderately hard due to the need for a specific Bolt RESET message with a crafted chunk size, and requires the Bolt endpoint to be enabled.","blast_radius":"If exploited, the impact could be severe, including execution of arbitrary code or a complete denial of service for the affected system.","remediation":"Disable the Bolt endpoint (BOLT_PORT) if not in use, or upgrade to FalkorDB 4.20.0 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","denial-of-service","remote","unauthenticated"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-09T08:43:22.483Z"}}