CVE-2026-71266 json
tinyobjloader-c Stack Buffer Overflow in MTL Material File Line Parsing
published 2026-08-05 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-53351
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 6%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
- syoyo tinyobjloader-c
Classification
- Weakness
-
- CWE-121 Stack-based Buffer Overflow
References
-
github.com
/syoyo/tinyobjloader-c
third-party-advisory
-
github.com
/syoyo/tinyobjloader-c/blob/master/tinyobj_loader_c.h
third-party-advisory
Sources
- CVE List CVE-2026-71266
- NVD CVE-2026-71266
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.