CVE-2026-85456

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-09-04. a secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: 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 fails to properly validate variable names extracted from alog files in the SplitHandler, allowing attackers to write files outside the split directory. Attackers can supply crafted alog files with backslash sequences in variable names to escape the output directory and append to arbitrary files on Windows systems.

CVSS v3
5.5
EG Score
5.5(high)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 8, 2026

Advisory Details (5)

Auto-updated Sep 3, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

MOOS-IvP through 24.8.1 alog Splitting Path Traversal on Windows | Advisories | VulnCheck

https://www.vulncheck.com/advisories/moos-ivp-through-24.8.1-alog-splitting-path-traversal-on-windows
generic

moos-ivp/ivp/src/lib_logutils/SplitHandler.cpp at 1de9ae146cd63c209e8c3fd81611a4ed2472971b · moos-ivp/moos-ivp · GitHub

https://github.com/moos-ivp/moos-ivp/blob/1de9ae146cd63c209e8c3fd81611a4ed2472971b/ivp/src/lib_logutils/SplitHandler.cpp#L189
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
github_commit

commit 6f0619e905b3 (moos-ivp/moos-ivp)

Fix landed in moos-ivp/moos-ivp commit 6f0619e905b3 — awaiting tagged release

https://github.com/moos-ivp/moos-ivp/commit/6f0619e905b325d6b88f76425673045c6e4f6f94
github_pr

alogsplit: reduce a log variable name to a safe file name

Upstream fix in progress (PR #137 · moos-ivp/moos-ivp, state=open)

https://github.com/moos-ivp/moos-ivp/pull/137

Vendor Advisories for CVE-2026-85456(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 20× in last 7d / 63× 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. 2026-09-25 05:12 UTCEG score recompute
  2. 2026-09-25 05:12 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 06:07 UTCEG score recompute
  5. 2026-09-24 06:07 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 07:02 UTCEG score recompute
  8. 2026-09-23 07:02 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 07:57 UTCEG score recompute
  11. 2026-09-22 07:57 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-21 08:51 UTCEG score recompute
  14. 2026-09-21 08:51 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 09:25 UTCEG score recompute
  17. 2026-09-20 09:25 UTCGHSA enrichment
  18. 2026-09-19 10:19 UTCEG score recompute
  19. 2026-09-19 10:19 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 11:14 UTCEG score recompute
  22. 2026-09-18 11:14 UTCGHSA enrichment
  23. 2026-09-17 19:32 UTCEPSS rescore
  24. 2026-09-17 12:09 UTCEG score recompute
  25. 2026-09-17 12:09 UTCGHSA enrichment
Show 38 more
  1. 2026-09-16 14:09 UTCEPSS rescore
  2. 2026-09-16 13:03 UTCEG score recompute
  3. 2026-09-16 13:03 UTCGHSA enrichment
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-15 13:58 UTCEG score recompute
  6. 2026-09-15 13:58 UTCGHSA enrichment
  7. 2026-09-15 03:12 UTCEPSS rescore
  8. 2026-09-15 03:12 UTCEPSS rescore
  9. 2026-09-14 14:53 UTCEG score recompute
  10. 2026-09-14 14:53 UTCGHSA enrichment
  11. 2026-09-13 15:48 UTCGHSA enrichment
  12. 2026-09-12 16:43 UTCEG score recompute
  13. 2026-09-12 16:43 UTCGHSA enrichment
  14. 2026-09-11 17:38 UTCEG score recompute
  15. 2026-09-11 17:38 UTCGHSA enrichment
  16. 2026-09-10 18:33 UTCEG score recompute
  17. 2026-09-10 18:33 UTCGHSA enrichment
  18. 2026-09-09 19:25 UTCEG score recompute
  19. 2026-09-09 19:25 UTCGHSA enrichment
  20. 2026-09-08 22:01 UTCEPSS rescore
  21. 2026-09-08 20:19 UTCGHSA enrichment
  22. 2026-09-08 10:47 UTCEG score recompute
  23. 2026-09-08 10:47 UTCGHSA enrichment
  24. 2026-09-08 10:44 UTCGHSA enrichment
  25. 2026-09-07 11:36 UTCEG score recompute
  26. 2026-09-07 11:35 UTCGHSA enrichment
  27. 2026-09-06 13:48 UTCEPSS rescore
  28. 2026-09-06 12:30 UTCEG score recompute
  29. 2026-09-06 12:30 UTCGHSA enrichment
  30. 2026-09-05 15:31 UTCEPSS rescore
  31. 2026-09-05 13:25 UTCGHSA enrichment
  32. 2026-09-04 14:19 UTCEG score recompute
  33. 2026-09-04 14:19 UTCGHSA enrichment
  34. 2026-09-04 13:45 UTCEG score recompute
  35. 2026-09-04 13:44 UTCGHSA enrichment
  36. 2026-09-03 23:26 UTCEG score recompute
  37. 2026-09-03 22:43 UTCEG score recompute
  38. 2026-09-03 22:43 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85456?
CVE-2026-85456 is a medium vulnerability published on September 3, 2026. MOOS-IvP through 24.8.1 fails to properly validate variable names extracted from alog files in the SplitHandler, allowing attackers to write files outside the split directory. Attackers can supply crafted alog files with backslash sequences in variable names to escape the output directory and…
When was CVE-2026-85456 disclosed?
CVE-2026-85456 was first published in the National Vulnerability Database on September 3, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85456 actively exploited?
CVE-2026-85456 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 92.9% of all scored CVEs.
What is the CVSS score of CVE-2026-85456?
CVE-2026-85456 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-85456?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85456, 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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