{"id":"CVE-2026-107908","title":"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 …","summary":"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 …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"published":"2026-10-09","updated":"2026-10-09","sourceUpdated":"2026-10-09T06:17:12.243","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107908","references":[{"url":"https://github.com/FalkorDB/FalkorDB/commit/0b11a00b34b25c4d4fdfe55f0a35c8a00593bd7d","label":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"},{"url":"https://github.com/FalkorDB/FalkorDB/pull/2170","label":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"},{"url":"https://github.com/FalkorDB/FalkorDB/releases/tag/v4.20.0","label":"33c584b5-0579-4c06-b2a0-8d8329fcab9c"}],"tags":["nvd"],"ingestedAt":"2026-10-09T06:27:05.589Z","slug":"CVE-2026-107908","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}