Craft CMS 5.0.0 through 5.10.12 treats a database connection failure as meaning that Craft is not installed, which makes anonymous installer actions — including install/validate-site — reachable on an installed production site whenever PHP remains available but the configured MySQL endpoint does not. The action accepts a site name, serializes it through Site::getName(), and expands ${NAME} expressions using App::env(). An unauthenticated attacker who obtained a guest session cookie and matching CSRF token before the outage and whose session remains valid during it can submit a predictable variable name (for example Craft's conventional CRAFT_SECURITY_KEY) and receive its value, disclosing Craft secrets, process environment variables, $_SERVER entries, or PHP constants such as the security key, database credentials, or API keys. The issue requires an independently occurring database outage; the vulnerability itself provides no way to induce it. Fixed in 5.10.13.
CVE-2026-92591
Score 5.9 from GitHub Security Advisory (severity: HIGH) published 2026-09-17. a secondary CVSS source baseline 5.9; sources differ by 0.0.
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.9
- EG Score
- 5.9(high)
- EG Risk
- 27(Track)EG Risk 27/100SSVC: 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 computedSeverity59% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 15%
- KEV
- Not listed
Published
September 16, 2026
Last Modified
September 17, 2026
Advisory Details (2)
Auto-updated Sep 16, 2026Craft CMS 5.0.0 before 5.10.13 Environment Secret Exposure via Installer | Advisories | VulnCheck
https://www.vulncheck.com/advisories/craft-cms-5.0.0-before-5.10.13-environment-secret-exposure-via-installerDatabase failure exposes environment secrets through the installer · Advisory · craftcms/cms · GitHub
https://github.com/craftcms/cms/security/advisories/GHSA-hfjh-gw6x-7pv5Vendor Advisories for CVE-2026-92591(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 11× in last 7d / 11× 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.
- 2026-09-18 19:28 UTCEPSS rescore
- 2026-09-18 14:23 UTCEG score recompute
- 2026-09-18 14:23 UTCGHSA enrichment
- 2026-09-17 19:32 UTCEPSS rescore
- 2026-09-17 14:24 UTCEG score recompute
- 2026-09-17 14:24 UTCGHSA enrichment
- 2026-09-17 13:35 UTCEG score recompute
- 2026-09-17 13:35 UTCGHSA enrichment
- 2026-09-16 22:25 UTCEG score recompute
- 2026-09-16 21:54 UTCEG score recompute
- 2026-09-16 21:54 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-92591?
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Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-92591
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