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Vulnerability record · CVE-2026-71266 · published 5 August 2026

CVE-2026-71266: Stack-based buffer overflow vulnerability

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.

7.8 CVSS 3.1 High EPSS 0.17% · top 93.9% CWE-121 · Stack-based buffer overflow Deferred
7.8CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
26 Aug 2026Last modified by 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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/syoyo/tinyobjloader-c
https://github.com/syoyo/tinyobjloader-c/blob/master/tinyobj_loader_c.h

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Source: NIST National Vulnerability Database (record CVE-2026-71266), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.