CVE-2026-84888

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-09-03. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

A weakness has been identified in RightNow-AI OpenFang up to 0.6.9. This vulnerability affects the function shell_exec of the file crates/openfang-runtime/src/tool_runner.rs. This manipulation causes uncontrolled memory allocation. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
4.3
EG Score
4.3(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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

September 2, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Sep 2, 2026
No patch confirmed yet.
generic

CVE/OpenFang_ShellExec_Output_Buffer_DoS_Report at main · outlookgp/CVE · GitHub

https://github.com/outlookgp/CVE/tree/main/OpenFang_ShellExec_Output_Buffer_DoS_Report

Vendor Advisories for CVE-2026-84888(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 52× 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. 2026-09-19 09:56 UTCEG score recompute
  2. 2026-09-19 09:56 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 08:47 UTCEG score recompute
  5. 2026-09-18 08:47 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-17 07:43 UTCEG score recompute
  8. 2026-09-17 07:43 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 06:40 UTCEG score recompute
  11. 2026-09-16 06:39 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 05:35 UTCEG score recompute
  14. 2026-09-15 05:35 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 04:30 UTCEG score recompute
  18. 2026-09-14 04:30 UTCGHSA enrichment
  19. 2026-09-13 03:26 UTCEG score recompute
  20. 2026-09-13 03:26 UTCGHSA enrichment
  21. 2026-09-12 02:22 UTCEG score recompute
  22. 2026-09-12 02:22 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-11 01:18 UTCEG score recompute
Show 27 more
  1. 2026-09-11 01:18 UTCGHSA enrichment
  2. 2026-09-10 00:14 UTCGHSA enrichment
  3. 2026-09-08 23:10 UTCEG score recompute
  4. 2026-09-08 23:10 UTCGHSA enrichment
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-07 21:53 UTCEG score recompute
  7. 2026-09-07 21:53 UTCGHSA enrichment
  8. 2026-09-06 20:49 UTCEG score recompute
  9. 2026-09-06 20:49 UTCGHSA enrichment
  10. 2026-09-06 13:48 UTCEPSS rescore
  11. 2026-09-05 19:45 UTCEG score recompute
  12. 2026-09-05 19:45 UTCGHSA enrichment
  13. 2026-09-05 15:31 UTCEPSS rescore
  14. 2026-09-04 18:42 UTCEG score recompute
  15. 2026-09-04 18:42 UTCGHSA enrichment
  16. 2026-09-04 05:07 UTCEPSS rescore
  17. 2026-09-03 17:39 UTCGHSA enrichment
  18. 2026-09-03 15:31 UTCEG score recompute
  19. 2026-09-03 15:31 UTCGHSA enrichment
  20. 2026-09-03 15:30 UTCNVD updateCVSS v4 → 2.1
  21. 2026-09-03 14:35 UTCEG score recompute
  22. 2026-09-03 14:35 UTCGHSA enrichment
  23. 2026-09-03 14:33 UTCMITRE cvelistV5CVSS v4 → 5.3
  24. 2026-09-03 05:29 UTCEG score recompute
  25. 2026-09-03 05:25 UTCNVD updateCVSS v4 → 2.1
  26. 2026-09-02 21:21 UTCEG score recompute
  27. 2026-09-02 21:20 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-84888?
CVE-2026-84888 is a medium vulnerability published on September 2, 2026. A weakness has been identified in RightNow-AI OpenFang up to 0.6.9. This vulnerability affects the function shellexec of the file crates/openfang-runtime/src/toolrunner.rs. This manipulation causes uncontrolled memory allocation. The attack is possible to be carried out remotely. The exploit has…
When was CVE-2026-84888 disclosed?
CVE-2026-84888 was first published in the National Vulnerability Database on September 2, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84888 actively exploited?
CVE-2026-84888 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 79.7% of all scored CVEs.
What is the CVSS score of CVE-2026-84888?
CVE-2026-84888 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-84888?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84888, 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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