CVE-2026-72722

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 75% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, TopicLink.extract_from, TopicLink.ensure_entry_for, and TopicLink.duplicate_lookup do not consistently enforce Guardian.can_see? checks when processing internal links. An authenticated user can submit links to restricted topics, private messages, or hidden posts and receive canonicalized slugs or titles in the composer_messages duplicate_lookup response even though the targets are not visible to that user. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

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
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 13, 2026

Advisory Details (9)

Auto-updated Aug 10, 2026
Patch available. Sources: github_commit, github_pr, github.
github Patch Available

Duplicate lookup reveals restricted topic titles through canonicalized URLs · Advisory · discourse/discourse · GitHub

https://github.com/discourse/discourse/security/advisories/GHSA-4fx9-5m29-83p4
github_pr

Security fixes for release/2026.6

Fix merged in discourse/discourse PR #42094 on 2026-07-28 — awaiting tagged release

https://github.com/discourse/discourse/pull/42094
github_pr

Security fixes for release/2026.5

Fix merged in discourse/discourse PR #42093 on 2026-07-28 — awaiting tagged release

https://github.com/discourse/discourse/pull/42093
github_pr

Security fixes for release/2026.1

Fix merged in discourse/discourse PR #42092 on 2026-07-28 — awaiting tagged release

https://github.com/discourse/discourse/pull/42092
github_pr

Security fixes for main

Fix merged in discourse/discourse PR #42091 on 2026-07-28 — awaiting tagged release

https://github.com/discourse/discourse/pull/42091
github_commit

commit e54ba27eacee (discourse/discourse)

Fix landed in discourse/discourse commit e54ba27eacee — awaiting tagged release

https://github.com/discourse/discourse/commit/e54ba27eacee0f14f315e510e287e7ac2e4bdb1a
github_commit

commit 836a251d54a1 (discourse/discourse)

Fix landed in discourse/discourse commit 836a251d54a1 — awaiting tagged release

https://github.com/discourse/discourse/commit/836a251d54a1004fb1c463a7d299b933b176191f
github_commit

commit 7d7ce546ac86 (discourse/discourse)

Fix landed in discourse/discourse commit 7d7ce546ac86 — awaiting tagged release

https://github.com/discourse/discourse/commit/7d7ce546ac86e24a6512b321ace69fc52fe37bf4
github_commit

commit 45abd925e46e (discourse/discourse)

Fix landed in discourse/discourse commit 45abd925e46e — awaiting tagged release

https://github.com/discourse/discourse/commit/45abd925e46e8be40d2d047bced26628f26e4e31

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 39× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 09:58 UTCEG score recompute
  3. 2026-08-28 21:42 UTCEPSS rescore
  4. 2026-08-27 19:42 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 14:52 UTCEG score recompute
  7. 2026-08-26 14:47 UTCEPSS rescore
  8. 2026-08-25 13:49 UTCEPSS rescore
  9. 2026-08-25 13:10 UTCEG score recompute
  10. 2026-08-24 11:28 UTCEG score recompute
  11. 2026-08-23 09:46 UTCEG score recompute
  12. 2026-08-23 00:19 UTCEPSS rescore
  13. 2026-08-22 08:04 UTCEG score recompute
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 06:22 UTCEG score recompute
  16. 2026-08-20 22:56 UTCEPSS rescore
  17. 2026-08-20 04:40 UTCEG score recompute
  18. 2026-08-19 17:04 UTCEPSS rescore
  19. 2026-08-19 02:57 UTCEG score recompute
  20. 2026-08-18 13:49 UTCEPSS rescore
  21. 2026-08-18 13:49 UTCEPSS rescore
  22. 2026-08-18 01:12 UTCEG score recompute
  23. 2026-08-17 13:47 UTCEPSS rescore
  24. 2026-08-16 23:25 UTCEG score recompute
  25. 2026-08-16 14:56 UTCEPSS rescore
Show 14 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 02:15 UTCEPSS rescore
  3. 2026-08-15 21:43 UTCEG score recompute
  4. 2026-08-15 01:31 UTCEPSS rescore
  5. 2026-08-14 20:01 UTCEG score recompute
  6. 2026-08-13 22:00 UTCEPSS rescore
  7. 2026-08-13 18:19 UTCEG score recompute
  8. 2026-08-13 18:12 UTCEG score recompute
  9. 2026-08-12 19:56 UTCEG score recompute
  10. 2026-08-12 13:51 UTCEPSS rescore
  11. 2026-08-11 18:14 UTCEG score recompute
  12. 2026-08-10 16:29 UTCEG score recompute
  13. 2026-08-10 16:10 UTCEG score recompute
  14. 2026-08-10 16:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-72722?
CVE-2026-72722 is a medium vulnerability 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, TopicLink.extractfrom, TopicLink.ensureentryfor, and TopicLink.duplicatelookup do not consistently enforce Guardian.cansee? checks when processing internal links. An authenticated user can submit…
When was CVE-2026-72722 disclosed?
CVE-2026-72722 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72722 actively exploited?
CVE-2026-72722 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.2% of all scored CVEs.
What is the CVSS score of CVE-2026-72722?
CVE-2026-72722 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-72722?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72722, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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