CVE-2026-59828

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (44th 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
5.3EG
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: 5.3Exploit: 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, post revisions that should be hidden from regular users could be leaked through visible diffs on adjacent revisions serialized by PostRevisionSerializer. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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)
Severity53% × 45%
The EG Score, 5.3 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
44th
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 13, 2026

Advisory Details (5)

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

Hidden post revisions leak through adjacent visible diffs · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-q456-4f8q-42vx
GitHub commit

commit d58988d46bb1 (discourse/discourse)

Fix landed in discourse/discourse commit d58988d46bb1 — awaiting tagged release

https://github.com/discourse/discourse/commit/d58988d46bb1019bfa8b8330ae81a1a134e08511
GitHub commit

commit 8d36da1b68c9 (discourse/discourse)

Fix landed in discourse/discourse commit 8d36da1b68c9 — awaiting tagged release

https://github.com/discourse/discourse/commit/8d36da1b68c906592abde3f2e94d505cdf097435
GitHub commit

commit 8b773332b0f9 (discourse/discourse)

Fix landed in discourse/discourse commit 8b773332b0f9 — awaiting tagged release

https://github.com/discourse/discourse/commit/8b773332b0f937dfcd894ed56d56fc5a81578d9d
GitHub commit

commit 1f26c1163ce8 (discourse/discourse)

Fix landed in discourse/discourse commit 1f26c1163ce8 — awaiting tagged release

https://github.com/discourse/discourse/commit/1f26c1163ce87a2abbd1d01780ab1b5fb16e75f6

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 35× 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 141 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 41 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% · 44th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-10-12 15:52 UTCEG score recompute
  4. 2026-10-11 19:36 UTCEG score recompute
  5. 2026-10-11 16:51 UTCEG score recompute
  6. 2026-10-11 14:13 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-01 16:00 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-09-28 09:59 UTCEG score recompute
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
Show 75 more
  1. 2026-09-24 11:22 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-09-23 05:51 UTCEG score recompute
  4. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  6. 2026-09-18 05:27 UTCEG score recompute
  7. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  9. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  11. 2026-09-14 07:27 UTCEG score recompute
  12. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  13. 2026-09-13 08:16 UTCEG score recompute
  14. 2026-09-12 03:20 UTCEG score recompute
  15. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  16. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  17. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-09-08 03:32 UTCEG score recompute
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  20. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-09-05 22:00 UTCEG score recompute
  22. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  23. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  26. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  27. 2026-08-30 06:42 UTCEG score recompute
  28. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  29. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  30. 2026-08-28 02:40 UTCEG score recompute
  31. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  32. 2026-08-27 02:58 UTCEG score recompute
  33. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  34. 2026-08-26 03:47 UTCEG score recompute
  35. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  36. 2026-08-24 21:43 UTCEG score recompute
  37. 2026-08-23 22:22 UTCEG score recompute
  38. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  39. 2026-08-22 00:01 UTCEG score recompute
  40. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  41. 2026-08-21 00:49 UTCEG score recompute
  42. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  43. 2026-08-20 01:38 UTCEG score recompute
  44. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  45. 2026-08-18 22:26 UTCEG score recompute
  46. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  47. 2026-08-17 22:15 UTCEG score recompute
  48. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  49. 2026-08-16 21:25 UTCEG score recompute
  50. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  51. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  52. 2026-08-15 22:14 UTCEG score recompute
  53. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  54. 2026-08-13 23:53 UTCEG score recompute
  55. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  56. 2026-08-13 00:42 UTCEG score recompute
  57. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  58. 2026-08-12 01:31 UTCEG score recompute
  59. 2026-08-11 02:21 UTCEG score recompute
  60. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  61. 2026-08-10 03:11 UTCEG score recompute
  62. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  63. 2026-08-08 04:50 UTCEG score recompute
  64. 2026-08-07 05:39 UTCEG score recompute
  65. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  66. 2026-08-06 06:29 UTCEG score recompute
  67. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  68. 2026-08-05 07:18 UTCEG score recompute
  69. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  70. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  71. 2026-08-04 08:08 UTCEG score recompute
  72. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  73. 2026-08-02 08:23 UTCEG score recompute
  74. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  75. 2026-08-01 09:12 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59828?
CVE-2026-59828 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, post revisions that should be hidden from regular users could be leaked through visible diffs on adjacent revisions serialized by PostRevisionSerializer. This issue is fixed in versions 2026.6.0,…
When was the CVE record for CVE-2026-59828 published?
The CVE record for CVE-2026-59828 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 13, 2026; the record at its source may have been updated since.
Is CVE-2026-59828 actively exploited?
CVE-2026-59828 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59828?
CVE-2026-59828 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59828?
The CVE record for CVE-2026-59828 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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