CVE-2026-71573

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 73% 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: cna:joomla, epss
Trending — 4 sources updated this week
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.9Exploit: None knownExposed: 0

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

Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper implementation prevented configured CORS origins from being properly validated in CORS requests.

CVSS v3
6.9
EG Score
6.9(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity69% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 19, 2026

Advisory Details (1)

Auto-updated Aug 18, 2026
No patch confirmed yet.
generic

Joomla Content Management System (CMS) - try it! It's free!

https://www.joomla.org/

Vendor Advisories for CVE-2026-71573(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 16× 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. 2026-08-21 07:34 UTCEG score recompute
  2. 2026-08-21 07:34 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 06:18 UTCEG score recompute
  5. 2026-08-20 06:18 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 05:02 UTCEG score recompute
  8. 2026-08-19 05:01 UTCGHSA enrichment
  9. 2026-08-18 20:23 UTCEG score recompute
  10. 2026-08-18 20:23 UTCGHSA enrichment
  11. 2026-08-18 19:45 UTCGHSA enrichment
  12. 2026-08-18 19:19 UTCEG score recompute
  13. 2026-08-18 19:19 UTCGHSA enrichment
  14. 2026-08-18 17:21 UTCEG score recompute
  15. 2026-08-18 16:22 UTCEG score recompute
  16. 2026-08-18 16:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-71573?
CVE-2026-71573 is a medium vulnerability published on August 18, 2026. Joomla! Core - [20260802] - Improper CORS origin validation in Joomla 4.0.0-5.4.7, 6.0.0-6.1.2 - An improper implementation prevented configured CORS origins from being properly validated in CORS requests.
When was CVE-2026-71573 disclosed?
CVE-2026-71573 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71573 actively exploited?
CVE-2026-71573 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 73.4% of all scored CVEs.
What is the CVSS score of CVE-2026-71573?
CVE-2026-71573 has a CVSS v4.0 base score of 6.9 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-71573?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71573, 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

Explore the affected products and dependency analysis for CVE-2026-71573

Explore →

Is Your Infrastructure Affected by CVE-2026-71573?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs