CVE-2026-71266

HIGH 7.8

tinyobjloader-c Stack Buffer Overflow in MTL Material File Line Parsing

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121
Vendor	syoyo
Product	tinyobjloader-c
Published	Aug 5, 2026
Last Updated	Aug 10, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

syoyo / tinyobjloader-c

0 ≤ *

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Alibek Baxtiyorov