CVE-2026-72730

HIGHPre-NVD 8.78.7
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (35th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
8.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.7Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, the Rich Text Editor rendered a chat-transcript username as HTML, allowing stored cross-site scripting. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
39
EG Risk 39/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity87% × 45%
Impact severity (EG Severity): CVSS 8.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
35th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.7): severity, escalated by confirmed exploitation. This CVE's 8.7 is its impact severity (EG Severity), not escalated.

EG Severity
8.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 10, 2026

Last Modified

September 8, 2026

Advisory Details (5)

Auto-updated Aug 10, 2026
Fix named in the CVE record. Sources: github, github_commit.
GitHub commit

commit 9633b8ecaf5a (discourse/discourse)

Fix landed in discourse/discourse commit 9633b8ecaf5a — awaiting tagged release

https://github.com/discourse/discourse/commit/9633b8ecaf5a99f0407f5261b9bd1a05f7dac529
GitHub commit

commit 7eb35d076ab9 (discourse/discourse)

Fix landed in discourse/discourse commit 7eb35d076ab9 — awaiting tagged release

https://github.com/discourse/discourse/commit/7eb35d076ab9b6a612e86182336ce9787ce402ea
GitHub commit

commit 3fb1e8ead0d4 (discourse/discourse)

Fix landed in discourse/discourse commit 3fb1e8ead0d4 — awaiting tagged release

https://github.com/discourse/discourse/commit/3fb1e8ead0d4f48d2cf55c8110825c7e8a6a45f5
GitHub commit

commit 32920affe4ad (discourse/discourse)

Fix landed in discourse/discourse commit 32920affe4ad — awaiting tagged release

https://github.com/discourse/discourse/commit/32920affe4ad97b461ca2ae2f664c5fefc374baf
GitHub advisoryMentions a patch (unverified)

Stored XSS chat-transcript username unescaped in Rich Text Editor · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-wg48-qxjc-f459

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 45× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 98 of 119 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 21 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-10-18 03:15 UTCEG score recompute
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  8. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  9. 2026-10-13 08:07 UTCEG score recompute
  10. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-10-12 15:41 UTCEG score recompute
  12. 2026-10-11 19:27 UTCEG score recompute
  13. 2026-10-11 16:42 UTCEG score recompute
  14. 2026-10-11 14:02 UTCEG score recompute
  15. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  16. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  17. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  19. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  20. 2026-10-06 18:21 UTCEG score recompute
  21. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  22. 2026-10-05 19:40 UTCEG score recompute
  23. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-10-05 07:47 UTCEG score recompute
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
Show 73 more
  1. 2026-10-04 04:25 UTCEG score recompute
  2. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-10-03 00:52 UTCEG score recompute
  4. 2026-10-02 09:18 UTCEG score recompute
  5. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  6. 2026-09-30 22:35 UTCEG score recompute
  7. 2026-09-29 05:22 UTCEG score recompute
  8. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-09-28 02:23 UTCEG score recompute
  10. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  11. 2026-09-27 12:45 UTCEG score recompute
  12. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-09-25 04:01 UTCEG score recompute
  14. 2026-09-23 23:36 UTCEG score recompute
  15. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-09-22 22:52 UTCEG score recompute
  17. 2026-09-21 23:02 UTCEG score recompute
  18. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-09-21 11:09 UTCEG score recompute
  20. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-09-20 02:59 UTCEG score recompute
  22. 2026-09-19 02:40 UTCEG score recompute
  23. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-09-18 02:47 UTCEG score recompute
  25. 2026-09-17 00:45 UTCEG score recompute
  26. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  27. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  28. 2026-09-15 13:53 UTCEG score recompute
  29. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  30. 2026-09-14 01:38 UTCEG score recompute
  31. 2026-09-13 01:52 UTCEG score recompute
  32. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  33. 2026-09-12 02:05 UTCEG score recompute
  34. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  35. 2026-09-11 14:11 UTCEG score recompute
  36. 2026-09-10 13:54 UTCEG score recompute
  37. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  38. 2026-09-09 09:13 UTCEG score recompute
  39. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  40. 2026-09-07 17:17 UTCEG score recompute
  41. 2026-09-06 15:31 UTCEG score recompute
  42. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  43. 2026-09-05 15:39 UTCEG score recompute
  44. 2026-09-05 01:57 UTCEG score recompute
  45. 2026-09-04 08:22 UTCEG score recompute
  46. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  47. 2026-09-03 02:30 UTCEG score recompute
  48. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  49. 2026-09-01 15:16 UTCEG score recompute
  50. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  51. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  52. 2026-08-30 21:37 UTCEG score recompute
  53. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  54. 2026-08-30 09:44 UTCEG score recompute
  55. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  56. 2026-08-29 09:56 UTCEG score recompute
  57. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  58. 2026-08-27 19:42 UTCEG score recompute
  59. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  60. 2026-08-26 18:54 UTCEG score recompute
  61. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  62. 2026-08-25 17:50 UTCEG score recompute
  63. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  64. 2026-08-24 18:04 UTCEG score recompute
  65. 2026-08-23 06:07 UTCEG score recompute
  66. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  67. 2026-08-22 06:21 UTCEG score recompute
  68. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  69. 2026-08-21 06:35 UTCEG score recompute
  70. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  71. 2026-08-19 18:55 UTCEG score recompute
  72. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  73. 2026-08-18 19:08 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-72730?
CVE-2026-72730 is a high-severity vulnerability; its CVE record was published on August 10, 2026. Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, the Rich Text Editor rendered a chat-transcript username as HTML, allowing stored cross-site scripting. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.
When was the CVE record for CVE-2026-72730 published?
The CVE record for CVE-2026-72730 was published on August 10, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-72730 actively exploited?
CVE-2026-72730 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72730?
CVE-2026-72730 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72730?
The CVE record for CVE-2026-72730 names the fix: "This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0."

Dependency Blast Radius

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