CVE-2026-71266

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
7.8
EG Score
7.8(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

tinyobjloader-c/tinyobj_loader_c.h at master · syoyo/tinyobjloader-c · GitHub

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

GitHub - syoyo/tinyobjloader-c: Header only tiny wavefront .obj loader in pure C99 · GitHub

https://github.com/syoyo/tinyobjloader-c

Vendor Advisories for CVE-2026-71266(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 31× in last 7d / 71× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 03:03 UTCEG score recompute
  2. 2026-08-21 03:03 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 14:20 UTCGHSA enrichment
  5. 2026-08-20 01:23 UTCEG score recompute
  6. 2026-08-20 01:23 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 12:40 UTCGHSA enrichment
  9. 2026-08-18 23:58 UTCEG score recompute
  10. 2026-08-18 23:58 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 11:15 UTCGHSA enrichment
  14. 2026-08-17 22:33 UTCEG score recompute
  15. 2026-08-17 22:33 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 09:50 UTCGHSA enrichment
  18. 2026-08-16 21:08 UTCEG score recompute
  19. 2026-08-16 21:08 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 08:25 UTCEG score recompute
  23. 2026-08-16 08:25 UTCGHSA enrichment
  24. 2026-08-16 02:15 UTCEPSS rescore
  25. 2026-08-15 19:43 UTCGHSA enrichment
Show 46 more
  1. 2026-08-15 07:00 UTCEG score recompute
  2. 2026-08-15 07:00 UTCGHSA enrichment
  3. 2026-08-15 01:31 UTCEPSS rescore
  4. 2026-08-14 18:17 UTCGHSA enrichment
  5. 2026-08-14 05:35 UTCEG score recompute
  6. 2026-08-14 05:35 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 16:52 UTCGHSA enrichment
  9. 2026-08-13 04:10 UTCGHSA enrichment
  10. 2026-08-12 15:28 UTCEG score recompute
  11. 2026-08-12 15:27 UTCGHSA enrichment
  12. 2026-08-12 13:51 UTCEPSS rescore
  13. 2026-08-12 02:31 UTCGHSA enrichment
  14. 2026-08-11 13:49 UTCEG score recompute
  15. 2026-08-11 13:49 UTCGHSA enrichment
  16. 2026-08-11 01:07 UTCEG score recompute
  17. 2026-08-11 01:07 UTCGHSA enrichment
  18. 2026-08-11 00:00 UTCEPSS rescore
  19. 2026-08-10 12:24 UTCEG score recompute
  20. 2026-08-10 12:24 UTCGHSA enrichment
  21. 2026-08-10 11:42 UTCGHSA enrichment
  22. 2026-08-10 11:22 UTCEG score recompute
  23. 2026-08-10 11:22 UTCGHSA enrichment
  24. 2026-08-10 10:53 UTCGHSA enrichment
  25. 2026-08-09 22:10 UTCEG score recompute
  26. 2026-08-09 22:10 UTCGHSA enrichment
  27. 2026-08-09 13:47 UTCEPSS rescore
  28. 2026-08-09 09:28 UTCGHSA enrichment
  29. 2026-08-08 20:46 UTCEG score recompute
  30. 2026-08-08 20:46 UTCGHSA enrichment
  31. 2026-08-08 16:37 UTCEPSS rescore
  32. 2026-08-08 08:03 UTCGHSA enrichment
  33. 2026-08-07 19:21 UTCEG score recompute
  34. 2026-08-07 19:21 UTCGHSA enrichment
  35. 2026-08-07 06:38 UTCGHSA enrichment
  36. 2026-08-06 17:55 UTCEG score recompute
  37. 2026-08-06 17:55 UTCGHSA enrichment
  38. 2026-08-06 13:47 UTCEPSS rescore
  39. 2026-08-06 05:13 UTCGHSA enrichment
  40. 2026-08-05 16:30 UTCEG score recompute
  41. 2026-08-05 16:30 UTCGHSA enrichment
  42. 2026-08-05 16:13 UTCEG score recompute
  43. 2026-08-05 16:13 UTCGHSA enrichment
  44. 2026-08-05 13:28 UTCEG score recompute
  45. 2026-08-05 13:08 UTCEG score recompute
  46. 2026-08-05 13:07 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71266?
CVE-2026-71266 is a high vulnerability published on August 5, 2026. tinyobjloader-c's tinyobjparseandindexmtlfile (tinyobjloaderc.h) reads each line of a .mtl material file into a fixed 4096-byte stack buffer via memcpy(linebuf, p, plen), guarded only by . The identical vulnerable pattern is duplicated in a second function in the same file.
When was CVE-2026-71266 disclosed?
CVE-2026-71266 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71266 actively exploited?
CVE-2026-71266 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.2% of all scored CVEs.
What is the CVSS score of CVE-2026-71266?
CVE-2026-71266 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-71266?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71266, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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