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Response snapshot Oct 28, 2026, 18:56 UTC

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VulnerabilityCVE-2026-47235

SimulationCraft is a tool to explore combat mechanics in World of Warcraft.

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"].

At a glance

Exploited
Not known
Severity
7.5 High (CVSS 4.0)
Chance of exploitation
Not estimated
Sources
1 source

What to do

Check the vendor advisory for affected versions and fixes.

Read NVD CVE-2026-47235 (opens a new tab)

What happened

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"].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.

Scores and how they were measured

CVSS base severity

7.5

Version 4.0As of

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Sources

  1. Primary source

    NVD CVE-2026-47235 (opens a new tab)

    NVD record: description, CVSS (the CNA score is preferred), affected products, and publication date. Not evidence of exploitation.

    Published Checked

  2. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  3. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  4. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 28). SimulationCraft is a tool to explore combat mechanics in World of Warcraft. (CVE-2026-47235). https://kevwire.com/record/CVE-2026-47235

MLA

"SimulationCraft is a tool to explore combat mechanics in World of Warcraft. (CVE-2026-47235)." KEVWire, 28 Oct. 2026, kevwire.com/record/CVE-2026-47235.

Chicago

KEVWire. "SimulationCraft is a tool to explore combat mechanics in World of Warcraft. (CVE-2026-47235)." Last modified October 28, 2026. https://kevwire.com/record/CVE-2026-47235.

Evidence summary (plain text)

SimulationCraft is a tool to explore combat mechanics in World of Warcraft. (Oct 28, 2026).
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"].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.
CVSS 7.5 (version 4.0; evidence as of Oct 28, 2026; https://nvd.nist.gov/vuln/detail/CVE-2026-47235).
Sources:
NVD CVE-2026-47235: https://nvd.nist.gov/vuln/detail/CVE-2026-47235
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-28T16:11:06.450Z&lastModEndDate=2026-10-28T17:40:58.118Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-28T15:41:02.957Z&lastModEndDate=2026-10-28T17:10:56.768Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-10-28T15:10:58.350Z&lastModEndDate=2026-10-28T16:40:56.161Z&resultsPerPage=500&startIndex=0
Record ID: CVE-2026-47235.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 28, 2026, 17:40 UTC. Ingestion is not an independent editorial investigation.

NVD status: Received. Publication in the NVD is not evidence of exploitation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

Record detail