CVE-2026-85438

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-04. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

MOOS-IvP through 24.8.1 contains a buffer overflow vulnerability in StringToIvPFunction() where dimension, piece, and degree counts from encoded BHV_IPF payloads are used as allocation sizes and loop bounds without validation. Attackers can supply crafted payloads with mismatched dimension values to write attacker-controlled doubles past the end of the IvPBox weight array, causing memory corruption and potential code execution.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 14, 2026

Advisory Details (5)

Auto-updated Sep 14, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
generic

MOOS-IvP through 24.8.1 Out-of-Bounds Write via Unvalidated IvP Payload Counts | Advisories | VulnCheck

https://www.vulncheck.com/advisories/moos-ivp-through-24.8.1-out-of-bounds-write-via-unvalidated-ivp-payload-counts
github_pr

Validate the counts a BHV_IPF payload declares about itself

Upstream fix in progress (PR #126 · moos-ivp/moos-ivp, state=open)

https://github.com/moos-ivp/moos-ivp/pull/126
github_commit

commit 85f4653ff792 (moos-ivp/moos-ivp)

Fix landed in moos-ivp/moos-ivp commit 85f4653ff792 — awaiting tagged release

https://github.com/moos-ivp/moos-ivp/commit/85f4653ff792b30c3ab14dc0eac0991d1405d904
generic

moos-ivp/ivp/src/lib_ivpbuild/FunctionEncoder.cpp at 1de9ae146cd63c209e8c3fd81611a4ed2472971b · moos-ivp/moos-ivp · GitHub

https://github.com/moos-ivp/moos-ivp/blob/1de9ae146cd63c209e8c3fd81611a4ed2472971b/ivp/src/lib_ivpbuild/FunctionEncoder.cpp#L407
generic

GitHub - moos-ivp/moos-ivp: MOOS-IvP is a set of modules for providing autonomy on robotic platforms, in particular autonomous marine vehicles. · GitHub

https://github.com/moos-ivp/moos-ivp

Vendor Advisories for CVE-2026-85438(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 55× in last 7d / 125× 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 125 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85438?
CVE-2026-85438 is a critical vulnerability published on September 3, 2026. MOOS-IvP through 24.8.1 contains a buffer overflow vulnerability in StringToIvPFunction() where dimension, piece, and degree counts from encoded BHV_IPF payloads are used as allocation sizes and loop bounds without validation. Attackers can supply crafted payloads with mismatched dimension values…
When was CVE-2026-85438 disclosed?
CVE-2026-85438 was first published in the National Vulnerability Database on September 3, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85438 actively exploited?
CVE-2026-85438 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 59.1% of all scored CVEs.
What is the CVSS score of CVE-2026-85438?
CVE-2026-85438 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-85438?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85438, 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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