CVE-2026-72720

MEDIUMPre-NVD 6.46.4
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (33rd 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
6.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.4Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

Discourse is an open-source discussion platform. Prior to 2026.1.7, 2026.6.2, 2026.7.1, and 2026.8.0-latest.1, Discourse has HTML injection in PrettyText.format_for_email because cooked attribute values are reparsed as markup. Crafted Vimeo iframe sources, secure-upload URLs or dimensions, and hashtag data-slug values can cause decoded attribute text to be reinterpreted as HTML. The vulnerable conversion also fails to strictly validate the Vimeo iframe host and path, allowing non-Vimeo allowlisted iframes to be converted. This issue is fixed in versions 2026.1.7, 2026.6.2, 2026.7.1, and 2026.8.0-latest.1.

CVSS v3
6.4
EG Score
6.4MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity64% × 45%
Impact severity (EG Severity): CVSS 6.4 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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.4%
EPSS %ILE
33rd
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 (6.4): severity, escalated by confirmed exploitation. This CVE's 6.4 is its impact severity (EG Severity), not escalated.

EG Severity
6.4 MEDIUMCVSS-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 every mission impact level.CISA BOD 26-04: 60 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 every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (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)60 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 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

August 10, 2026

Last Modified

September 8, 2026

Advisory Details (9)

Auto-updated Aug 10, 2026
Fix named in the CVE record. Sources: github_commit, github_pr, github.
GitHub advisoryMentions a patch (unverified)

HTML injection in PrettyText.format_for_email from cooked-attribute reparsing · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-3q6f-6gm9-m35v
GitHub pull request

Security fixes for release/2026.1

Fix merged in discourse/discourse PR #42247 on 2026-07-31 — awaiting tagged release

https://github.com/discourse/discourse/pull/42247
GitHub pull request

Security fixes for release/2026.6

Fix merged in discourse/discourse PR #42246 on 2026-07-31 — awaiting tagged release

https://github.com/discourse/discourse/pull/42246
GitHub pull request

Security fixes for release/2026.7

Fix merged in discourse/discourse PR #42245 on 2026-07-31 — awaiting tagged release

https://github.com/discourse/discourse/pull/42245
GitHub pull request

Security fixes for main

Fix merged in discourse/discourse PR #42244 on 2026-07-31 — awaiting tagged release

https://github.com/discourse/discourse/pull/42244
GitHub commit

commit b25a074b1652 (discourse/discourse)

Fix landed in discourse/discourse commit b25a074b1652 — awaiting tagged release

https://github.com/discourse/discourse/commit/b25a074b165253e01fc4c8911b980fc68338ea16
GitHub commit

commit a5d3b112d598 (discourse/discourse)

Fix landed in discourse/discourse commit a5d3b112d598 — awaiting tagged release

https://github.com/discourse/discourse/commit/a5d3b112d598242c1d1803d5a77bf98d5fdabd75
GitHub commit

commit 4b639a52f47f (discourse/discourse)

Fix landed in discourse/discourse commit 4b639a52f47f — awaiting tagged release

https://github.com/discourse/discourse/commit/4b639a52f47fb3d46093bece9df147e4e9517a11
GitHub commit

commit 234ee88a5b9b (discourse/discourse)

Fix landed in discourse/discourse commit 234ee88a5b9b — awaiting tagged release

https://github.com/discourse/discourse/commit/234ee88a5b9b53bf938c53351eab20130323485f

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 41× 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 97 of 114 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 17 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% · 33rd percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  3. 2026-10-18 03:15 UTCEG score recompute
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  5. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  8. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  10. 2026-10-12 15:41 UTCEG score recompute
  11. 2026-10-11 19:27 UTCEG score recompute
  12. 2026-10-11 16:42 UTCEG score recompute
  13. 2026-10-11 14:02 UTCEG score recompute
  14. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  16. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-10-06 18:21 UTCEG score recompute
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  21. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-05 02:36 UTCEG score recompute
  23. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-10-04 04:26 UTCEG score recompute
  25. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
Show 72 more
  1. 2026-10-02 09:19 UTCEG score recompute
  2. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-09-30 22:36 UTCEG score recompute
  4. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-09-28 10:50 UTCEG score recompute
  6. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-09-27 12:45 UTCEG score recompute
  8. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-09-25 04:01 UTCEG score recompute
  10. 2026-09-23 21:10 UTCEG score recompute
  11. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  12. 2026-09-22 21:16 UTCEG score recompute
  13. 2026-09-21 22:09 UTCEG score recompute
  14. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  15. 2026-09-20 21:17 UTCEG score recompute
  16. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  17. 2026-09-19 23:13 UTCEG score recompute
  18. 2026-09-19 00:34 UTCEG score recompute
  19. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  20. 2026-09-18 02:30 UTCEG score recompute
  21. 2026-09-17 04:26 UTCEG score recompute
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  23. 2026-09-16 06:20 UTCEG score recompute
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  25. 2026-09-15 08:16 UTCEG score recompute
  26. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  27. 2026-09-14 10:11 UTCEG score recompute
  28. 2026-09-13 11:54 UTCEG score recompute
  29. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  30. 2026-09-11 15:46 UTCEG score recompute
  31. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  32. 2026-09-10 17:33 UTCEG score recompute
  33. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  34. 2026-09-09 19:24 UTCEG score recompute
  35. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  36. 2026-09-07 20:34 UTCEG score recompute
  37. 2026-09-06 22:29 UTCEG score recompute
  38. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  39. 2026-09-06 00:24 UTCEG score recompute
  40. 2026-09-05 02:06 UTCEG score recompute
  41. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  42. 2026-09-03 05:58 UTCEG score recompute
  43. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  44. 2026-09-02 06:25 UTCEG score recompute
  45. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  46. 2026-09-01 07:05 UTCEG score recompute
  47. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  48. 2026-08-31 06:33 UTCEG score recompute
  49. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  50. 2026-08-30 08:04 UTCEG score recompute
  51. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  52. 2026-08-29 09:58 UTCEG score recompute
  53. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  54. 2026-08-28 11:40 UTCEG score recompute
  55. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  56. 2026-08-27 08:53 UTCEG score recompute
  57. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  58. 2026-08-26 10:49 UTCEG score recompute
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  60. 2026-08-24 14:40 UTCEG score recompute
  61. 2026-08-23 16:34 UTCEG score recompute
  62. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  63. 2026-08-22 18:30 UTCEG score recompute
  64. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  65. 2026-08-21 20:25 UTCEG score recompute
  66. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  67. 2026-08-20 00:17 UTCEG score recompute
  68. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  69. 2026-08-19 02:13 UTCEG score recompute
  70. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  71. 2026-08-18 04:09 UTCEG score recompute
  72. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile

Frequently asked(5)

What is CVE-2026-72720?
CVE-2026-72720 is a medium-severity vulnerability; its CVE record was published on August 10, 2026. Discourse is an open-source discussion platform. Prior to 2026.1.7, 2026.6.2, 2026.7.1, and 2026.8.0-latest.1, Discourse has HTML injection in PrettyText.formatforemail because cooked attribute values are reparsed as markup. Crafted Vimeo iframe sources, secure-upload URLs or dimensions, and…
When was the CVE record for CVE-2026-72720 published?
The CVE record for CVE-2026-72720 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-2026-72720 actively exploited?
CVE-2026-72720 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (33rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72720?
CVE-2026-72720 has a CVSS base score of 6.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72720?
The CVE record for CVE-2026-72720 names the fix: "This issue is fixed in versions 2026.1.7, 2026.6.2, 2026.7.1, and 2026.8.0-latest.1."

Dependency Blast Radius

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