CVE-2026-78357 OTRS - Authentication Bypass

OTRS 7.0.X, 8.0.X, 2023.X, 2024.X, 2025.X, and < 2026.7.X contain an authentication token invalidation flaw caused by delayed JWT revocation after user deactivation or password change, letting attackers with previously obtained tokens maintain access until token expiration, exploit requires possession of a valid token.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.30% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-613

Vendor fix

Update to version 2026.7.X or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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