CVE-2026-71266

7.8 HIGHpublic exploit available

Published 2026-08-05 · Updated 2026-08-10

AI risk analysis

Summary: The flaw in tinyobjloader-c allows an attacker to overflow a stack buffer by manipulating a .mtl file, leading to potential code execution or data corruption.
Exploitability: Exploitation is moderately hard as it requires crafting a specific .mtl file with a payload that overflows the buffer, and the vulnerability is only triggered via a read operation.
Blast radius: If exploited, the impact could be severe, potentially leading to remote code execution or data loss on the affected system.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the fixed version 2.590 or later.

buffer-overflowstack-overflowfile-inclusion

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

tinyobjloader-c's tinyobj_parse_and_index_mtl_file (tinyobj_loader_c.h) reads each line of a .mtl material file into a fixed 4096-byte stack buffer via memcpy(linebuf, p, p_len), guarded only by . The identical vulnerable pattern is duplicated in a second function in the same file.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses

CWE-121

Public exploit & PoC references

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.