CVE-2026-43961

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 95% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, 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

A fix is available — apply it.

A flaw was found in Vim's netrw plugin. A crafted filename containing quote characters and expression fragments can break out of the quoted context during mark/unmark operations, allowing arbitrary Vimscript execution. This can be leveraged to run shell commands with the privileges of the user running Vim.

CVSS v3
7.8
EG Score
7.8(medium)
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
5%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 26, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
Patch available. Sources: redhat, github.
github Patch Available

Vimscript Code Injection in netrw NetrwMarkFile() via crafted filename affects Vim < 9.2.0480 · Advisory · vim/vim · GitHub

https://github.com/vim/vim/security/advisories/GHSA-66hr-7p6x-x5j3
redhat

2460434 – (CVE-2026-43961) CVE-2026-43961 vim: Vimscript injection via unescaped filename in netrw s:NetrwMarkFile() filter() expression allows arbitrary code execution

https://bugzilla.redhat.com/show_bug.cgi?id=2460434
redhat Patch Available

CVE-2026-43961 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-43961

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxxd (2:8.0.1453-1ubuntu1.13+esm19) @ bionic2026-08-30ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 24× in last 7d / 46× 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. 2026-08-30 02:59 UTCEG score recompute
  2. 2026-08-30 02:59 UTCVendor advisory
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 14:30 UTCVendor advisory
  5. 2026-08-29 02:01 UTCEG score recompute
  6. 2026-08-29 02:01 UTCVendor advisory
  7. 2026-08-28 21:41 UTCEPSS rescore
  8. 2026-08-27 16:40 UTCEG score recompute
  9. 2026-08-27 14:25 UTCEPSS rescore
  10. 2026-08-27 04:11 UTCVendor advisory
  11. 2026-08-26 15:42 UTCEG score recompute
  12. 2026-08-26 15:42 UTCVendor advisory
  13. 2026-08-26 14:46 UTCEPSS rescore
  14. 2026-08-26 14:10 UTCEG score recompute
  15. 2026-08-26 14:10 UTCVendor advisory
  16. 2026-08-26 06:44 UTCVendor advisory
  17. 2026-08-25 18:15 UTCEG score recompute
  18. 2026-08-25 18:15 UTCVendor advisory
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-25 05:46 UTCVendor advisory
  21. 2026-08-24 17:16 UTCEG score recompute
  22. 2026-08-24 17:16 UTCVendor advisory
  23. 2026-08-24 04:48 UTCVendor advisory
  24. 2026-08-23 16:20 UTCVendor advisory
  25. 2026-08-23 03:51 UTCEG score recompute
Show 21 more
  1. 2026-08-23 03:51 UTCVendor advisory
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-22 15:23 UTCVendor advisory
  4. 2026-08-22 02:54 UTCEG score recompute
  5. 2026-08-22 02:54 UTCVendor advisory
  6. 2026-08-21 23:49 UTCEPSS rescore
  7. 2026-08-21 14:26 UTCVendor advisory
  8. 2026-08-21 01:58 UTCEG score recompute
  9. 2026-08-21 01:58 UTCVendor advisory
  10. 2026-08-20 22:55 UTCEPSS rescore
  11. 2026-08-20 13:29 UTCVendor advisory
  12. 2026-08-20 05:52 UTCVendor advisory
  13. 2026-08-19 17:23 UTCEG score recompute
  14. 2026-08-19 17:23 UTCVendor advisory
  15. 2026-08-19 17:07 UTCEG score recompute
  16. 2026-08-19 17:07 UTCVendor advisory
  17. 2026-08-19 15:24 UTCVendor advisory
  18. 2026-08-19 14:25 UTCEG score recompute
  19. 2026-08-19 14:12 UTCEG score recompute
  20. 2026-08-19 14:12 UTCVendor advisory
  21. 2026-08-19 14:12 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-43961?
CVE-2026-43961 is a high vulnerability published on August 19, 2026. A flaw was found in Vim's netrw plugin. A crafted filename containing quote characters and expression fragments can break out of the quoted context during mark/unmark operations, allowing arbitrary Vimscript execution. This can be leveraged to run shell commands with the privileges of the user…
When was CVE-2026-43961 disclosed?
CVE-2026-43961 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43961 actively exploited?
CVE-2026-43961 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 94.6% of all scored CVEs.
What is the CVSS score of CVE-2026-43961?
CVE-2026-43961 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-43961?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43961, 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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