CVE-2026-109321CWE-1391

CVE-2026-109321

Critical · published October 12, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
33.3
In the wild
Unconfirmed
What it is

Grav Login OAuth plugin (grav-plugin-login-oauth) before 1.4.3 provisions OAuth accounts as ordinary Grav users with a deterministic <provider>.<id> username and an unsalted MD5 hash of the provider identifier as the password, without disabling password login. Unauthenticated remote attackers who learn or guess a provider identifier can reproduce these credentials and log in, gaining administrative control of privileged accounts.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS
0.00402 · 33.3th percentile
Weakness
CWE-1391 · Use of Weak Credentials
Published
2026-10-12T21:17Z
References (2)
https://github.com/getgrav/grav/security/advisories/GHSA-mj8v-hvf6-73gm · [email protected]https://www.vulncheck.com/advisories/grav-login-oauth-plugin-before-1.4.3-predictable-local-credentials-authentication-bypass · [email protected]
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 16:05Z
    Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass
    cvelistv5
  • 12 OCT 16:05Z
    Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass
    cvelistv5