CVE-2026-74253

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 10.0 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
Trending — 4 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

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

Joomla Extension - regularlabs.com - Unauthenticated RCE through unverified reflected user input in Sourcerer < 14.0.0 - Regular Labs Sourcerer before 14.0.0 processes {source} blocks found in Joomla’s final rendered HTML without reliably determining where that code originated.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 17, 2026

Advisory Details (1)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

Regular Labs - Extensions for Joomla! - Regular Labs

https://regularlabs.com/

Vendor Advisories for CVE-2026-74253(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 30× in last 7d / 30× 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 05:41 UTCGHSA enrichment
  2. 2026-08-21 01:23 UTCEG score recompute
  3. 2026-08-21 01:23 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-20 21:05 UTCGHSA enrichment
  6. 2026-08-20 16:47 UTCGHSA enrichment
  7. 2026-08-20 12:29 UTCGHSA enrichment
  8. 2026-08-20 08:11 UTCGHSA enrichment
  9. 2026-08-20 03:53 UTCGHSA enrichment
  10. 2026-08-19 23:34 UTCGHSA enrichment
  11. 2026-08-19 19:16 UTCEG score recompute
  12. 2026-08-19 19:16 UTCGHSA enrichment
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 14:56 UTCGHSA enrichment
  15. 2026-08-19 10:37 UTCGHSA enrichment
  16. 2026-08-19 06:17 UTCGHSA enrichment
  17. 2026-08-19 01:55 UTCGHSA enrichment
  18. 2026-08-18 21:36 UTCGHSA enrichment
  19. 2026-08-18 16:58 UTCEG score recompute
  20. 2026-08-18 16:58 UTCGHSA enrichment
  21. 2026-08-18 13:49 UTCEPSS rescore
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-18 11:42 UTCGHSA enrichment
  24. 2026-08-18 07:24 UTCGHSA enrichment
  25. 2026-08-18 03:05 UTCGHSA enrichment
Show 5 more
  1. 2026-08-17 22:47 UTCGHSA enrichment
  2. 2026-08-17 18:29 UTCEG score recompute
  3. 2026-08-17 17:47 UTCEG score recompute
  4. 2026-08-17 17:20 UTCEG score recompute
  5. 2026-08-17 17:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74253?
CVE-2026-74253 is a critical vulnerability published on August 17, 2026. Joomla Extension - regularlabs.com - Unauthenticated RCE through unverified reflected user input in Sourcerer < 14.0.0 - Regular Labs Sourcerer before 14.0.0 processes {source} blocks found in Joomla’s final rendered HTML without reliably determining where that code originated.
When was CVE-2026-74253 disclosed?
CVE-2026-74253 was first published in the National Vulnerability Database on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74253 actively exploited?
CVE-2026-74253 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 74.7% of all scored CVEs.
What is the CVSS score of CVE-2026-74253?
CVE-2026-74253 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-74253?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74253, 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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