CVE-2026-38961

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-09-04. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Cross-Site Scripting (XSS) vulnerability in the RSS Widget of Netgate pfSense Plus (versions 26.03, 25.11.1) and pfSense CE (version 2.8.1) allows remote authenticated attackers to inject arbitrary JavaScript via malicious content in an RSS feed title. The injected script executes in the browser of any authenticated user who views the dashboard, due to insufficient sanitization of feed title data before rendering in the widget.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

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

September 4, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Sep 9, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic
https://docs.netgate.com/downloads/pfSense-SA-26_04.webgui.asc
github_commit

commit 9363ac5b8651 (pfsense/pfsense)

Fix landed in pfsense/pfsense commit 9363ac5b8651 — awaiting tagged release

https://github.com/pfsense/pfsense/commit/9363ac5b8651a1c7a333180425ce7719070f95f9

Vendor Advisories for CVE-2026-38961(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 19× in last 7d / 81× 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. 2026-10-04 23:40 UTCEG score recompute
  2. 2026-10-04 23:40 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 01:01 UTCEG score recompute
  5. 2026-10-04 01:00 UTCGHSA enrichment
  6. 2026-10-03 14:25 UTCEPSS rescore
  7. 2026-10-03 00:23 UTCEG score recompute
  8. 2026-10-03 00:23 UTCGHSA enrichment
  9. 2026-10-02 00:31 UTCEG score recompute
  10. 2026-10-02 00:31 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-10-01 01:28 UTCEG score recompute
  13. 2026-10-01 01:28 UTCGHSA enrichment
  14. 2026-09-30 15:03 UTCEPSS rescore
  15. 2026-09-30 02:49 UTCEG score recompute
  16. 2026-09-30 02:49 UTCGHSA enrichment
  17. 2026-09-28 23:24 UTCEG score recompute
  18. 2026-09-28 23:24 UTCGHSA enrichment
  19. 2026-09-28 13:51 UTCEPSS rescore
  20. 2026-09-28 00:45 UTCEG score recompute
  21. 2026-09-28 00:45 UTCGHSA enrichment
  22. 2026-09-27 13:48 UTCEPSS rescore
  23. 2026-09-27 02:05 UTCEG score recompute
  24. 2026-09-27 02:05 UTCGHSA enrichment
  25. 2026-09-26 15:58 UTCEPSS rescore
Show 59 more
  1. 2026-09-26 03:20 UTCEG score recompute
  2. 2026-09-26 03:19 UTCGHSA enrichment
  3. 2026-09-26 00:26 UTCEPSS rescore
  4. 2026-09-25 00:08 UTCEG score recompute
  5. 2026-09-25 00:08 UTCGHSA enrichment
  6. 2026-09-24 01:05 UTCEG score recompute
  7. 2026-09-24 01:05 UTCGHSA enrichment
  8. 2026-09-23 02:26 UTCEG score recompute
  9. 2026-09-23 02:26 UTCGHSA enrichment
  10. 2026-09-22 03:46 UTCEG score recompute
  11. 2026-09-22 03:46 UTCGHSA enrichment
  12. 2026-09-21 05:07 UTCEG score recompute
  13. 2026-09-21 05:07 UTCGHSA enrichment
  14. 2026-09-20 20:15 UTCEPSS rescore
  15. 2026-09-20 06:04 UTCEG score recompute
  16. 2026-09-20 06:04 UTCGHSA enrichment
  17. 2026-09-19 07:25 UTCEG score recompute
  18. 2026-09-19 07:24 UTCGHSA enrichment
  19. 2026-09-18 19:28 UTCEPSS rescore
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 08:45 UTCEG score recompute
  22. 2026-09-18 08:45 UTCGHSA enrichment
  23. 2026-09-17 19:30 UTCEPSS rescore
  24. 2026-09-17 10:06 UTCEG score recompute
  25. 2026-09-17 10:06 UTCGHSA enrichment
  26. 2026-09-16 14:08 UTCEPSS rescore
  27. 2026-09-16 11:27 UTCEG score recompute
  28. 2026-09-16 11:27 UTCGHSA enrichment
  29. 2026-09-16 05:15 UTCEPSS rescore
  30. 2026-09-15 12:45 UTCEG score recompute
  31. 2026-09-15 12:45 UTCGHSA enrichment
  32. 2026-09-15 03:11 UTCEPSS rescore
  33. 2026-09-14 14:06 UTCEG score recompute
  34. 2026-09-14 14:06 UTCGHSA enrichment
  35. 2026-09-13 16:47 UTCEPSS rescore
  36. 2026-09-13 15:27 UTCGHSA enrichment
  37. 2026-09-12 16:48 UTCEG score recompute
  38. 2026-09-12 16:48 UTCGHSA enrichment
  39. 2026-09-12 15:01 UTCEPSS rescore
  40. 2026-09-11 18:08 UTCEG score recompute
  41. 2026-09-11 18:08 UTCGHSA enrichment
  42. 2026-09-11 14:53 UTCEPSS rescore
  43. 2026-09-11 09:37 UTCEPSS rescore
  44. 2026-09-10 19:29 UTCEG score recompute
  45. 2026-09-10 19:29 UTCGHSA enrichment
  46. 2026-09-10 09:34 UTCEPSS rescore
  47. 2026-09-09 20:49 UTCGHSA enrichment
  48. 2026-09-09 19:46 UTCEG score recompute▲ 5.40
  49. 2026-09-09 19:46 UTCGHSA enrichment
  50. 2026-09-09 19:46 UTCMITRE cvelistV5CVSS v3 → 5.4 · severity → MEDIUM
  51. 2026-09-09 16:09 UTCGHSA enrichment
  52. 2026-09-08 22:00 UTCEPSS rescore
  53. 2026-09-07 16:01 UTCEPSS rescore
  54. 2026-09-07 14:49 UTCEG score recompute
  55. 2026-09-07 14:49 UTCGHSA enrichment
  56. 2026-09-06 13:47 UTCEPSS rescore
  57. 2026-09-04 17:24 UTCNVD update
  58. 2026-09-04 16:39 UTCEG score recompute
  59. 2026-09-04 16:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-38961?
CVE-2026-38961 is a medium vulnerability published on September 4, 2026. Cross-Site Scripting (XSS) vulnerability in the RSS Widget of Netgate pfSense Plus (versions 26.03, 25.11.1) and pfSense CE (version 2.8.1) allows remote authenticated attackers to inject arbitrary JavaScript via malicious content in an RSS feed title. The injected script executes in the browser of…
When was CVE-2026-38961 disclosed?
CVE-2026-38961 was first published on September 4, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-38961 actively exploited?
CVE-2026-38961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-38961?
CVE-2026-38961 has a CVSS v3.1 base score of 5.4 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-38961?
An upstream fix for CVE-2026-38961 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-38961 are linked in the Vendor Advisories panel on this page.

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