CVE-2026-8484

MEDIUMPre-NVD 4.84.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% 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 — 4 sources updated this week
4.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.8Exploit: None knownExposed: 0

A fix is available — apply it.

A heap buffer overflow vulnerability exists in the Jansi JNI "ioctl()" wrapper due to a lack of size verification for the argument array before the system call. This can lead to heap corruption and application crashes (DoS). All versions are believed to be vulnerable. This project is unmaintained at the time of CVE assignment.

CVSS v3
4.8
EG Score
4.8(medium)
EG Risk
26(Track)
EG Risk 26/100SSVC: 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
Severity48% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 16, 2026

Advisory Details (2)

Auto-updated Jun 16, 2026
No patch confirmed yet.
generic

GitHub - fusesource/jansi: Jansi is a small java library that allows you to use ANSI escape sequences to format your console output which works even on windows. · GitHub

https://github.com/fusesource/jansi/tree/master
generic

Vulnerability in jansi library | CERT Polska

https://cert.pl/en/posts/2026/06/CVE-2026-8484

Vendor Advisories for CVE-2026-8484(3)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatjansi2026-08-13redhat

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.

Affected Packages

(7 across 4 ecosystems)
Debian:12(2)
PackageVulnerable rangeFixed inDependents
jansi2.4.0-2, 2.4.0-3, 2.4.1-1, 2.4.1-2, 2.4.2-1——
jansi-native1.8-1, 1.8-2——
Debian:13(2)
PackageVulnerable rangeFixed inDependents
jansi2.4.1-2, 2.4.2-1——
jansi-native1.8-2——
Debian:14(2)
PackageVulnerable rangeFixed inDependents
jansi2.4.1-2, 2.4.2-1——
jansi-native1.8-2——
Debian:11(1)
PackageVulnerable rangeFixed inDependents
jansi-native1.8-1, 1.8-2——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 50× 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 190 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-8484?
CVE-2026-8484 is a medium vulnerability published on June 16, 2026. A heap buffer overflow vulnerability exists in the Jansi JNI "ioctl()" wrapper due to a lack of size verification for the argument array before the system call. This can lead to heap corruption and application crashes (DoS). All versions are believed to be vulnerable. This project is unmaintained…
When was CVE-2026-8484 disclosed?
CVE-2026-8484 was first published in the National Vulnerability Database on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8484 actively exploited?
CVE-2026-8484 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 96.3% of all scored CVEs.
What is the CVSS score of CVE-2026-8484?
CVE-2026-8484 has a CVSS v3 base score of 4.8 (NVD).
How do I remediate CVE-2026-8484?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8484, 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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