{"id":"CVE-2026-47235","title":"SimulationCraft: Heap-Based Buffer Overflow / Out-of-Bounds Write in SimulationCraft's gem_id Array","summary":"SimulationCraft is a tool to explore combat mechanics in World of Warcraft. In builds after release-820-01 and before the identified May 7, 2026 nightly, the `bcp_api.cpp` loop over the JSON `sockets` array uses `slot_data[\"sockets\"].Siz…","severity":"high","cvss":7.5,"cvssVector":"CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L","cvssSource":"cna","cwe":["CWE-122","CWE-787"],"vendor":"simulationcraft","product":"simc","affected":["simc < aff85992d284ca4621e784c6b065a271b22f629d"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-10-29T18:38:11.836574Z"},"exploitAvailable":true,"published":"2026-10-28","updated":"2026-10-29","sourceUpdated":"2026-10-29T18:38:47.642Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-47235","references":[{"url":"https://github.com/simulationcraft/simc/security/advisories/GHSA-wc9c-hfh3-phxx","label":"https://github.com/simulationcraft/simc/security/advisories/GHSA-wc9c-hfh3-phxx"},{"url":"https://github.com/simulationcraft/simc/commit/aff85992d284ca4621e784c6b065a271b22f629d","label":"https://github.com/simulationcraft/simc/commit/aff85992d284ca4621e784c6b065a271b22f629d"}],"tags":["cve.org","exploit-available"],"epss":0.00153,"epssPercentile":0.04467,"ingestedAt":"2026-10-28T16:13:50.583Z","slug":"CVE-2026-47235","body":"## Overview\n\nSimulationCraft is a tool to explore combat mechanics in World of Warcraft. In builds after release-820-01 and before the identified May 7, 2026 nightly, the `bcp_api.cpp` loop over the JSON `sockets` array uses `slot_data[\"sockets\"].Size()` without bounding `gem_idx` by `MAX_GEM_SLOTS`, which is four in `engine/sc_enums.hpp`. The destination `gem_id` and `gem_bonus_id` arrays in `engine/item/item.hpp` have only four elements. More than four socket entries therefore write beyond `gem_id` into the adjacent `gem_bonus_id` vector storage; `bonus_list` entries can also access `gem_bonus_id` out of bounds. Corrupting a vector's `_M_start` pointer causes the `item_t` destructor to free an attacker-influenced pointer during normal cleanup. The advisory reports crashes and code execution demonstrated in a testing environment. Attack inputs can arrive through a malicious `.simc` profile with a `[[equipment]]` section, a compromised addon export, or `Battle.net API` responses modified by an attacker with a privileged network position. The fix is contained in the nightly build identified as simc-1205-01-516b5d7; no containing release tag is available.\n\n## Affected\n\n- `simc < aff85992d284ca4621e784c6b065a271b22f629d`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":232005,"id":"CVE-2026-47235","ts":1793574268590,"field":"exploit_available","old":"false","new":"true"}]}