Buffer overflow in Syoyo Tinyobjloader-C
CVE-2026-71266
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 class: Buffer Overflow
EPSS: 0.001 (2.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Syoyo Tinyobjloader-c — versions 0
Weakness classification (CWE)
References
- 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)
- 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)
Frequently asked questions
- What is CVE-2026-71266?
- CVE-2026-71266 is a high-severity vulnerability in Syoyo Tinyobjloader-C, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-08-05.
- How severe is CVE-2026-71266?
- High severity. CVSS v3 base score is 7.8 out of 10.