CVE-2026-109373
ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that…
- Risk score
- 61/100
- CVSS
- 8.1 v3.1
- Exploit chance (30 days)
- 0.4%
- Published
- 12 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to obtain other users' session tokens by forging unsigned session cookies. Attackers can guess time-ordered session IDs around a victim's sign-in and supply them with empty tokens to rec…
- Affected
- See advisory
- Fix
- Upgrade the product to 4.19.2 or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.1 high
- Remotely exploitable without logging in
References
Original description
ZITADEL 3.0.0 before 4.19.2 contains an authentication bypass vulnerability in the Login V2 UI that allows unauthenticated attackers to obtain other users' session tokens by forging unsigned session cookies. Attackers can guess time-ordered session IDs around a victim's sign-in and supply them with empty tokens to receive rotated tokens, taking over accounts including MFA-completed administrator sessions.
Last activity 12 Oct 2026. Patch Forecast updates every hour.