CVE-2026-45780

MEDIUMNVD 4.34.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 4.3 under NVD CVSS v3. EPSS exploit probability: 0.5% (40th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
4.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 4.3Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, EventSerializer could expose invited group names, sample invitees, and attendance statistics to users who could view the topic but were not entitled to view the private event invitee list. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
35
EG Risk 35/100

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 (value × EchelonGraph’s weight)
Severity43% × 45%
The EG Score, 4.3 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

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

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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

July 9, 2026

Last Modified

July 14, 2026

Advisory Details (5)

Auto-updated Jul 9, 2026
Fix named in the CVE record. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Private event sample invitees are serialized to non-invited event viewers · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7
GitHub commit

commit 7deb4b696344 (discourse/discourse)

Fix landed in discourse/discourse commit 7deb4b696344 — awaiting tagged release

https://github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594e5e730
GitHub commit

commit 6457ab71f36a (discourse/discourse)

Fix landed in discourse/discourse commit 6457ab71f36a — awaiting tagged release

https://github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a2593897844b023
GitHub commit

commit 4d46638041b5 (discourse/discourse)

Fix landed in discourse/discourse commit 4d46638041b5 — awaiting tagged release

https://github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586
GitHub commit

commit 37969503f203 (discourse/discourse)

Fix landed in discourse/discourse commit 37969503f203 — awaiting tagged release

https://github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4f63f5f1

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 30× 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 100 of 133 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. None are among the latest 100 rows. The 33 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-12 16:04 UTCEG score recompute
  4. 2026-10-11 19:46 UTCEG score recompute
  5. 2026-10-11 17:00 UTCEG score recompute
  6. 2026-10-11 14:26 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-10-01 16:00 UTCEG score recompute
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  19. 2026-09-28 09:59 UTCEG score recompute
  20. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-09-24 11:22 UTCEG score recompute
  23. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-09-23 05:51 UTCEG score recompute
  25. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
Show 75 more
  1. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  2. 2026-09-18 05:26 UTCEG score recompute
  3. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  4. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  5. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  6. 2026-09-14 05:58 UTCEG score recompute
  7. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  8. 2026-09-13 08:16 UTCEG score recompute
  9. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  10. 2026-09-12 03:19 UTCEG score recompute
  11. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  12. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  13. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  14. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-09-08 03:23 UTCEG score recompute
  16. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-09-05 22:00 UTCEG score recompute
  19. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  20. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  21. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  22. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-08-30 06:42 UTCEG score recompute
  24. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  25. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  26. 2026-08-27 21:43 UTCEG score recompute
  27. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  28. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  29. 2026-08-26 12:54 UTCEG score recompute
  30. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  31. 2026-08-25 11:53 UTCEG score recompute
  32. 2026-08-24 14:12 UTCEG score recompute
  33. 2026-08-23 16:22 UTCEG score recompute
  34. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  35. 2026-08-22 18:41 UTCEG score recompute
  36. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  37. 2026-08-20 23:19 UTCEG score recompute
  38. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  39. 2026-08-20 01:38 UTCEG score recompute
  40. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  41. 2026-08-19 01:26 UTCEG score recompute
  42. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  43. 2026-08-18 03:45 UTCEG score recompute
  44. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  45. 2026-08-17 06:04 UTCEG score recompute
  46. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  47. 2026-08-16 07:42 UTCEG score recompute
  48. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  49. 2026-08-15 10:02 UTCEG score recompute
  50. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  51. 2026-08-14 12:20 UTCEG score recompute
  52. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  53. 2026-08-12 16:58 UTCEG score recompute
  54. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  55. 2026-08-11 19:17 UTCEG score recompute
  56. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  57. 2026-08-09 23:55 UTCEG score recompute
  58. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  59. 2026-08-09 02:14 UTCEG score recompute
  60. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  61. 2026-08-08 04:33 UTCEG score recompute
  62. 2026-08-07 06:52 UTCEG score recompute
  63. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  64. 2026-08-06 09:11 UTCEG score recompute
  65. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  66. 2026-08-05 11:30 UTCEG score recompute
  67. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  68. 2026-08-04 13:36 UTCEG score recompute
  69. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  70. 2026-08-03 15:34 UTCEG score recompute
  71. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  72. 2026-08-02 17:53 UTCEG score recompute
  73. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  74. 2026-08-01 20:11 UTCEG score recompute
  75. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.4% · 29th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45780?
CVE-2026-45780 is a medium-severity vulnerability; its CVE record was published on July 9, 2026. Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, EventSerializer could expose invited group names, sample invitees, and attendance statistics to users who could view the topic but were not entitled to view the private event invitee list. This…
When was the CVE record for CVE-2026-45780 published?
The CVE record for CVE-2026-45780 was published on July 9, 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 July 14, 2026; the record at its source may have been updated since.
Is CVE-2026-45780 actively exploited?
CVE-2026-45780 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45780?
CVE-2026-45780 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-45780?
The CVE record for CVE-2026-45780 names the fix: "This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5."

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