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.
CVE-2026-72720
“—” 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.
- Lower severity and no public exploit yet
The CVE record names the fixed release — apply it.
- CVSS v3
- 6.4
- EG Score
- 6.4MEDIUMmedium confidence
- EG Risk
- 29EG 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, 2026HTML injection in PrettyText.format_for_email from cooked-attribute reparsing · Advisory · discourse/discourse · GitHub
https://github.com/discourse/discourse/security/advisories/GHSA-3q6f-6gm9-m35vSecurity 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/42247Security 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/42246Security 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/42245Security fixes for main
Fix merged in discourse/discourse PR #42244 on 2026-07-31 — awaiting tagged release
https://github.com/discourse/discourse/pull/42244commit b25a074b1652 (discourse/discourse)
Fix landed in discourse/discourse commit b25a074b1652 — awaiting tagged release
https://github.com/discourse/discourse/commit/b25a074b165253e01fc4c8911b980fc68338ea16commit a5d3b112d598 (discourse/discourse)
Fix landed in discourse/discourse commit a5d3b112d598 — awaiting tagged release
https://github.com/discourse/discourse/commit/a5d3b112d598242c1d1803d5a77bf98d5fdabd75commit 4b639a52f47f (discourse/discourse)
Fix landed in discourse/discourse commit 4b639a52f47f — awaiting tagged release
https://github.com/discourse/discourse/commit/4b639a52f47fb3d46093bece9df147e4e9517a11commit 234ee88a5b9b (discourse/discourse)
Fix landed in discourse/discourse commit 234ee88a5b9b — awaiting tagged release
https://github.com/discourse/discourse/commit/234ee88a5b9b53bf938c53351eab20130323485fWeakness 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.
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-18 03:15 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-12 15:41 UTCEG score recompute
- 2026-10-11 19:27 UTCEG score recompute
- 2026-10-11 16:42 UTCEG score recompute
- 2026-10-11 14:02 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-06 18:21 UTCEG score recompute
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-05 02:36 UTCEG score recompute
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-10-04 04:26 UTCEG score recompute
- 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
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- 2026-10-02 09:19 UTCEG score recompute
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-09-30 22:36 UTCEG score recompute
- 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-09-28 10:50 UTCEG score recompute
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-09-27 12:45 UTCEG score recompute
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
- 2026-09-25 04:01 UTCEG score recompute
- 2026-09-23 21:10 UTCEG score recompute
- 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-22 21:16 UTCEG score recompute
- 2026-09-21 22:09 UTCEG score recompute
- 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-20 21:17 UTCEG score recompute
- 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-19 23:13 UTCEG score recompute
- 2026-09-19 00:34 UTCEG score recompute
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-18 02:30 UTCEG score recompute
- 2026-09-17 04:26 UTCEG score recompute
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-16 06:20 UTCEG score recompute
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-15 08:16 UTCEG score recompute
- 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-14 10:11 UTCEG score recompute
- 2026-09-13 11:54 UTCEG score recompute
- 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-11 15:46 UTCEG score recompute
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-10 17:33 UTCEG score recompute
- 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-09 19:24 UTCEG score recompute
- 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-07 20:34 UTCEG score recompute
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- 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-06 00:24 UTCEG score recompute
- 2026-09-05 02:06 UTCEG score recompute
- 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-03 05:58 UTCEG score recompute
- 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-02 06:25 UTCEG score recompute
- 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-09-01 07:05 UTCEG score recompute
- 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-08-31 06:33 UTCEG score recompute
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-08-30 08:04 UTCEG score recompute
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-08-29 09:58 UTCEG score recompute
- 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 21st percentile
- 2026-08-28 11:40 UTCEG score recompute
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 21st percentile
- 2026-08-27 08:53 UTCEG score recompute
- 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.3% · 21st percentile
- 2026-08-26 10:49 UTCEG score recompute
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 21st percentile
- 2026-08-24 14:40 UTCEG score recompute
- 2026-08-23 16:34 UTCEG score recompute
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-08-22 18:30 UTCEG score recompute
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-08-21 20:25 UTCEG score recompute
- 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-08-20 00:17 UTCEG score recompute
- 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-08-19 02:13 UTCEG score recompute
- 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
- 2026-08-18 04:09 UTCEG score recompute
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-72720?
When was the CVE record for CVE-2026-72720 published?
Is CVE-2026-72720 actively exploited?
What is the CVSS score of CVE-2026-72720?
How do I remediate CVE-2026-72720?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-72720
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