TI-2026-50937 Aliases CVE-2026-72699 GHSA-55hc-4r2f-h6wr

Grav Login Plugin before 3.9.1 Email Enumeration via Registration

HIGH 79CWE-203Published 2026-08-25 · Updated 2026-08-29

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-203.

Summary

The Grav Login plugin (getgrav/grav-plugin-login) before 3.9.1 is vulnerable to email address enumeration. The register() method in classes/Login.php throws a distinct exception (EMAIL_NOT_AVAILABLE) when a submitted email address already belongs to an existing account, while allowing registration to proceed otherwise. Because the registration endpoint has no rate limiting, an attacker can enumerate which email addresses have accounts on the site, one guess per request.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00257 17th percentileScored 2026-11-07

Fix Fixed grav-plugin-login (getgrav): 3.9.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
getgrav	grav-plugin-login	before 3.9.1	3.9.1	Patch available	CNA

grav-plugin-login Vendorgetgrav Affected before 3.9.1 Fixed in 3.9.1 Patch available CNA

Remediation

Fix · CNA grav-plugin-login (getgrav) Fixed in 3.9.1

Timeline

2026-10-02 Threatist record created from CVE-2026-72699
2026-10-03 Alias added: GHSA-55hc-4r2f-h6wr

References

Advisory 1

GitHub Security Advisory (GHSA-crh8-xm27-j9g9)

TI-2026-30893 Grav: Privilege Escalation via Missing Server-Side Validation of groups/access CVSS 3.1CRITICAL 9.4
TI-2025-28971 Cross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to… CVSS 3.1CRITICAL 9.8
TI-2021-04523 Unauthenticated Arbitrary YAML Write/Update leads to Code Execution CVSS 3.1CRITICAL 9.8
TI-2026-50940 Grav CMS before 2.0.16 Origin Validation Bypass via Referer CVSS 4.0CRITICAL 9.3
TI-2026-46446 Grav before 2.0.7 Remote Code Execution via Blueprint dynamicData CVSS 4.0CRITICAL 9.3
TI-2021-22428 GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2) CVSS 4.0CRITICAL 9.3

See all 228 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences