Vulnerability · Published Oct 27, 2026 · Assigned by VulnCheck
CVE-2026-116841DevilutionX 1.4.0 through 1.5.5 Out-of-Bounds Read via libmpq Hash Table Lookup
Medium 5.5
In plain English
A medium-severity out-of-bounds read in DevilutionX from diasurgical. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 98.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
DevilutionX 1.4.0 through 1.5.5 contains an out-of-bounds read vulnerability in the bundled libmpq libmpq__file_number_from_hash function that allows attackers to read heap memory via unchecked block_table_index values. Attackers can place a crafted .mpq archive in the game's data path, such as a mod, to trigger reads past mpq_map and crash the game.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| diasurgical | DevilutionX | 1.4.0 – through 1.5.5 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://github.com/diasurgical/DevilutionX/issues/8758 issue-tracking
- https://github.com/diasurgical/DevilutionX/pull/8482 patch, issue-tracking
- https://github.com/diasurgical/libmpq/blob/b78d66c6fee6a501cc9b95d8556a129c68841b05/libmpq/mpq.c#L740 technical-description
- https://github.com/diasurgical/DevilutionX/blob/7223eeac9e8274fbf665b4de86fda26d3b22c52f/3rdParty/libmpq/CMakeLists.txt technical-description
- https://hackmd.io/@haindpwn/devilutionx-libmpq-hash-block-table-oob technical-description
- VulnCheck Advisory: DevilutionX 1.4.0 through 1.5.5 Out-of-Bounds Read via libmpq Hash Table Lookup third-party-advisory