Insufficient Session Revocation for JWT Authentication

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-78357
StatePUBLISHED
AssignerOTRS
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-12 07:16:37 UTC
Updated2026-10-12 07:16:37 UTC
DescriptionPreviously issued authentication tokens are not immediately invalidated when an OTRS agent or customer user account is deactivated or its password is changed. As a result, an existing JWT may remain valid until its regular expiration time, which can be approximately 16 hours. An attacker who has previously obtained a valid authentication token can therefore continue to access OTRS with the privileges of the affected agent or customer user even after the corresponding account has been deactivated or the user's password has been changed. The vulnerability does not allow an attacker to obtain authentication tokens by itself. Exploitation requires possession of a previously issued and still valid token. The actual impact depends on the privileges associated with the compromised token. Customer user tokens are limited to the permissions of the affected customer account, while agent tokens may provide access to broader ticket, customer, or administrative functionality depending on the assigned permissions. This issue affects OTRS: * 7.0.X * 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.7.X

Risk And Classification

Primary CVSS: v3.1 9.1 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Problem Types: CWE-613 | CWE-613 CWE-613 Insufficient Session Expiration

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNACVSS9.1CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OTRS GmbH Former OTRS AG OTRS affected 7.0.x Not specified
CNA OTRS GmbH Former OTRS AG OTRS affected 8.0.x Not specified
CNA OTRS GmbH Former OTRS AG OTRS affected 2023.x Not specified
CNA OTRS GmbH Former OTRS AG OTRS affected 2024.x Not specified
CNA OTRS GmbH Former OTRS AG OTRS affected 2025.x Not specified
CNA OTRS GmbH Former OTRS AG OTRS affected 2026.x 2026.6.x patch Not specified

References

ReferenceSourceLinkTags
otrs.com/release-notes/otrs-security-advisory-2026-14 [email protected] otrs.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Special thanks to William Bastos (@chor4o) and Samara Gama (igobysamy) for reporting this vulnerability (en)

Additional Advisory Data

Solutions

CNA: Update to latest version of OTRS (2026.7.1. or later). Please note that there will be no OTRS 7 patches

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