CVE-2026-71268

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-05. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.9Exploit: None knownExposed: 0

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

OpenPLC Runtime v3's compile_program function (webserver/openplc.py) parses directives from uploaded Structured Text (.st) program files and writes the referenced content to with no validation that file_path stays within the ./core directory. A path-validation function, validate_file_path, exists elsewhere in the codebase (webserver/credentials.py) but is never invoked from compile_program, leaving the sink unprotected.

CVSS v3
9.9
EG Score
9.9(high)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity99% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

OpenPLC_v3/webserver/openplc.py at master · thiagoralves/OpenPLC_v3 · GitHub

https://github.com/thiagoralves/OpenPLC_v3/blob/master/webserver/openplc.py
generic

GitHub - thiagoralves/OpenPLC_v3: OpenPLC Runtime version 3 · GitHub

https://github.com/thiagoralves/OpenPLC_v3

Vendor Advisories for CVE-2026-71268(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 60× in last 7d / 141× 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.

Showing the most recent 100 of 141 total refreshes for this CVE.

  1. 2026-08-21 08:53 UTCGHSA enrichment
  2. 2026-08-21 05:10 UTCGHSA enrichment
  3. 2026-08-21 01:28 UTCEG score recompute
  4. 2026-08-21 01:28 UTCGHSA enrichment
  5. 2026-08-20 22:56 UTCEPSS rescore
  6. 2026-08-20 21:45 UTCGHSA enrichment
  7. 2026-08-20 18:03 UTCGHSA enrichment
  8. 2026-08-20 14:20 UTCGHSA enrichment
  9. 2026-08-20 09:45 UTCGHSA enrichment
  10. 2026-08-20 06:02 UTCGHSA enrichment
  11. 2026-08-20 02:19 UTCGHSA enrichment
  12. 2026-08-19 22:36 UTCGHSA enrichment
  13. 2026-08-19 18:53 UTCEG score recompute
  14. 2026-08-19 18:53 UTCGHSA enrichment
  15. 2026-08-19 17:04 UTCEPSS rescore
  16. 2026-08-19 14:13 UTCGHSA enrichment
  17. 2026-08-19 10:30 UTCGHSA enrichment
  18. 2026-08-19 06:48 UTCGHSA enrichment
  19. 2026-08-19 03:00 UTCGHSA enrichment
  20. 2026-08-18 23:13 UTCGHSA enrichment
  21. 2026-08-18 19:30 UTCGHSA enrichment
  22. 2026-08-18 15:46 UTCEG score recompute
  23. 2026-08-18 15:46 UTCGHSA enrichment
  24. 2026-08-18 13:49 UTCEPSS rescore
  25. 2026-08-18 13:49 UTCEPSS rescore
Show 75 more
  1. 2026-08-18 10:25 UTCGHSA enrichment
  2. 2026-08-18 06:41 UTCGHSA enrichment
  3. 2026-08-18 02:57 UTCGHSA enrichment
  4. 2026-08-17 23:14 UTCGHSA enrichment
  5. 2026-08-17 19:31 UTCGHSA enrichment
  6. 2026-08-17 15:27 UTCEG score recompute
  7. 2026-08-17 15:27 UTCGHSA enrichment
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-17 11:44 UTCGHSA enrichment
  10. 2026-08-17 07:59 UTCGHSA enrichment
  11. 2026-08-17 04:17 UTCGHSA enrichment
  12. 2026-08-17 00:34 UTCGHSA enrichment
  13. 2026-08-16 20:51 UTCGHSA enrichment
  14. 2026-08-16 17:08 UTCEG score recompute
  15. 2026-08-16 17:08 UTCGHSA enrichment
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 13:25 UTCGHSA enrichment
  19. 2026-08-16 09:42 UTCGHSA enrichment
  20. 2026-08-16 06:00 UTCGHSA enrichment
  21. 2026-08-16 02:17 UTCEG score recompute
  22. 2026-08-16 02:17 UTCGHSA enrichment
  23. 2026-08-16 02:15 UTCEPSS rescore
  24. 2026-08-15 22:35 UTCGHSA enrichment
  25. 2026-08-15 18:52 UTCGHSA enrichment
  26. 2026-08-15 15:09 UTCGHSA enrichment
  27. 2026-08-15 11:26 UTCGHSA enrichment
  28. 2026-08-15 07:43 UTCGHSA enrichment
  29. 2026-08-15 04:00 UTCEG score recompute
  30. 2026-08-15 04:00 UTCGHSA enrichment
  31. 2026-08-15 01:31 UTCEPSS rescore
  32. 2026-08-15 00:17 UTCGHSA enrichment
  33. 2026-08-14 20:35 UTCGHSA enrichment
  34. 2026-08-14 16:52 UTCGHSA enrichment
  35. 2026-08-14 13:04 UTCGHSA enrichment
  36. 2026-08-14 09:21 UTCGHSA enrichment
  37. 2026-08-14 05:39 UTCGHSA enrichment
  38. 2026-08-14 01:56 UTCGHSA enrichment
  39. 2026-08-13 22:14 UTCEG score recompute
  40. 2026-08-13 22:14 UTCGHSA enrichment
  41. 2026-08-13 22:00 UTCEPSS rescore
  42. 2026-08-13 18:31 UTCGHSA enrichment
  43. 2026-08-13 14:48 UTCGHSA enrichment
  44. 2026-08-13 11:05 UTCGHSA enrichment
  45. 2026-08-13 07:21 UTCGHSA enrichment
  46. 2026-08-13 03:38 UTCGHSA enrichment
  47. 2026-08-12 23:55 UTCGHSA enrichment
  48. 2026-08-12 20:13 UTCGHSA enrichment
  49. 2026-08-12 16:30 UTCEG score recompute
  50. 2026-08-12 16:30 UTCGHSA enrichment
  51. 2026-08-12 13:51 UTCEPSS rescore
  52. 2026-08-12 12:48 UTCGHSA enrichment
  53. 2026-08-12 09:05 UTCGHSA enrichment
  54. 2026-08-12 05:22 UTCGHSA enrichment
  55. 2026-08-12 01:40 UTCGHSA enrichment
  56. 2026-08-11 21:57 UTCGHSA enrichment
  57. 2026-08-11 18:15 UTCGHSA enrichment
  58. 2026-08-11 14:25 UTCEG score recompute
  59. 2026-08-11 14:25 UTCGHSA enrichment
  60. 2026-08-11 10:41 UTCGHSA enrichment
  61. 2026-08-11 06:58 UTCGHSA enrichment
  62. 2026-08-11 03:15 UTCEG score recompute
  63. 2026-08-11 03:15 UTCGHSA enrichment
  64. 2026-08-11 00:00 UTCEPSS rescore
  65. 2026-08-10 23:33 UTCGHSA enrichment
  66. 2026-08-10 19:50 UTCGHSA enrichment
  67. 2026-08-10 16:07 UTCGHSA enrichment
  68. 2026-08-10 12:24 UTCEG score recompute
  69. 2026-08-10 12:24 UTCGHSA enrichment
  70. 2026-08-10 11:42 UTCGHSA enrichment
  71. 2026-08-10 11:22 UTCEG score recompute
  72. 2026-08-10 11:22 UTCGHSA enrichment
  73. 2026-08-10 07:49 UTCGHSA enrichment
  74. 2026-08-10 04:07 UTCGHSA enrichment
  75. 2026-08-10 00:24 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71268?
CVE-2026-71268 is a critical vulnerability published on August 5, 2026. OpenPLC Runtime v3's compileprogram function (webserver/openplc.py) parses directives from uploaded Structured Text (.st) program files and writes the referenced content to with no validation that filepath stays within the ./core directory. A path-validation function, validatefilepath, exists…
When was CVE-2026-71268 disclosed?
CVE-2026-71268 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-2026-71268 actively exploited?
CVE-2026-71268 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 70.2% of all scored CVEs.
What is the CVSS score of CVE-2026-71268?
CVE-2026-71268 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-71268?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71268, 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.

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