CVE-2026-67189

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2026-08-19. The CNA's CVSS baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 6.1Exploit: None knownExposed services: Not assessed

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

pfSense Plus before 26.07 and pfSense CE through 2.8.1 contain a stored cross-site scripting vulnerability in the Traffic Graphs top-talkers feature, where PTR records returned by reverse DNS lookups are incorporated without sanitization into AJAX responses and rendered as HTML through a DOM sink in the administrator interface. An attacker who controls a PTR record and generates sufficient traffic to appear as a top talker can execute arbitrary JavaScript in an administrator's browser, gaining access to the authenticated session context and same-origin access to the firewall management interface, enabling account creation and arbitrary OS command execution.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100CISA SSVC

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
Severity61% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
1.2%
EPSS %ILE
66th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

October 1, 2026

Advisory Details (4)

Auto-updated Aug 19, 2026
No fix on record yet.
generic

pfSense Plus/CE Stored XSS via Traffic Graphs PTR Record | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-traffic-graphs-ptr-record
generic

2.9.0 New Features and Changes | pfSense Documentation

https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html
generic

26.07 New Features and Changes | pfSense Documentation

https://docs.netgate.com/pfsense/en/latest/releases/26-07.html
generic
https://docs.netgate.com/downloads/pfSense-SA-26_21.webgui.asc

Vendor Advisories for CVE-2026-67189(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 16× in last 7d / 71× 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 134 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67189?
CVE-2026-67189 is a medium vulnerability published on August 19, 2026. pfSense Plus before 26.07 and pfSense CE through 2.8.1 contain a stored cross-site scripting vulnerability in the Traffic Graphs top-talkers feature, where PTR records returned by reverse DNS lookups are incorporated without sanitization into AJAX responses and rendered as HTML through a DOM sink…
When was CVE-2026-67189 disclosed?
CVE-2026-67189 was first published on August 19, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67189 actively exploited?
CVE-2026-67189 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (66th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67189?
CVE-2026-67189 has a CVSS base score of 6.1 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-67189?
No fix for CVE-2026-67189 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-67189 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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