CVE-2026-109373

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Source
https://cve.org/CVERecord?id=CVE-2026-109373
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109373.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-109373
Aliases
  • GHSA-jh92-5mrj-p2w2
Published
2026-10-12T16:05:45Z
Modified
2026-10-13T02:46:58Z
Severity
  • 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
ZITADEL 3.0.0 before 4.19.2 Account Takeover via Unsigned Login V2 Session Cookie
Details

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.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-441"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109373.json"
}
References

Affected packages

Git / github.com/zitadel/zitadel

Affected ranges

Type
GIT
Repo
https://github.com/zitadel/zitadel
Events
Introduced
573c96d6af6aa8778efd9bff59f9bc0dab94c495
Fixed
2c37c4176ad51c3db0354122e06af53a88d30d4e
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "3.0.0"
        },
        {
            "fixed":  "4.19.2"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.0.4
v3.1.0
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.3.0
v3.3.1
v3.3.2
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.1.0
v4.1.1
v4.1.2
v4.1.3
v4.1.4
v4.10.0
v4.10.1
v4.11.0
v4.11.1
v4.12.0
v4.12.1
v4.12.2
v4.12.3
v4.13.0
v4.13.1
v4.14.0
v4.15.0
v4.15.1
v4.15.2
v4.15.3
v4.16.0
v4.16.1
v4.16.2
v4.16.3
v4.17.0
v4.17.1
v4.17.2
v4.17.3
v4.18.0
v4.19.0
v4.19.1
v4.2.0
v4.2.1
v4.2.2
v4.3.0
v4.3.1
v4.3.2
v4.3.3
v4.4.0
v4.5.0
v4.6.0
v4.6.1
v4.6.2
v4.6.3
v4.6.4
v4.6.5
v4.6.6
v4.7.0
v4.7.1
v4.7.2
v4.7.3
v4.7.4
v4.7.5
v4.7.6
v4.8.0
v4.8.1
v4.9.0
v4.9.1
v4.9.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109373.json"