CVE-2026-109321
Raw vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2026-109321 is a critical-severity Use of Weak Credentials (CWE-1391) vulnerability. Its CVSS base score is 9.3 (Critical).
Operationally, ranked at the 33th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-97623
Vulnerability Data
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…
more
or guess a provider identifier can reproduce these credentials and log in, gaining administrative control of privileged accounts.
- CWE(s)
Related Threats
CVEs Like This One
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
A.5.17 mandates generation of non-guessable unique credentials, immediate change of defaults/temporary secrets, strong password enforcement, no reuse, blocking of compromised passwords, and secure transmission/storage; this stops exploitation of weak/guessable/default credentials for most but not all cases in CWE-1391 (e.g. leaves some non-password credential forms or post-compromise reuse outside its explicit scope).
Restricts privileged accounts but does not explicitly address default or hard-coded credentials for those accounts.
Requires security activities throughout the SDLC that can catch weak credentials, but does not mandate their elimination.
Secure-coding rules can prohibit hard-coded passwords, yet coverage depends on specific coding standards adopted.
Security testing can discover weak credentials, but does not guarantee they are prevented by design.
A.8.5 mandates strong, multi-factor, non-guessable authentication techniques (with brute-force protection, no cleartext, etc.) that stop weak credentials from being successfully exploited; the bounded remainder is hard-coded/default credentials inside non-interactive product components where no human or session authentication occurs at all.
Hardening callouts derived
DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.
- No fine-grained STIG row for CWE-1391, a class-level weakness. Rules are authored against its narrower children: CWE-521.