CVE-2026-71266
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
tinyobjloader-c's tinyobj_parse_and_index_mtl_file reads each line of a .mtl material file into a fixed 4096-byte stack buffer via memcpy(linebuf, p, p_len), guarded only by [incomplete condition]. The identical vulnerable pattern is duplicated in a second function in the same file.
Risk Assessment
Stack buffer overflow may lead to crashes or remote code execution when processing malicious .mtl files.
Recommendation
Check line length before copying and use safe copy functions with buffer size limits.
Related vulnerabilities
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

