CVE-2026-78357— Insufficient Session Revocation for JWT Authentication
Quick assessment
Affected
OTRS GmbH (former OTRS AG) OTRS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
当 OTRS 代理或客户用户账号被停用或其密码被更改时，之前颁发的身份验证令牌并未立即失效。因此，现有的 JWT（JSON Web Token）可能在其正常过期时间前仍然有效，该过期时间大约为 16 小时。 因此，此前已获得有效身份验证令牌的攻击者，即使在相应账号已被停用或用户密码已被更改的情况下，仍可继续以受影响代理或客户用户的权限访问 OTRS。 该漏洞本身无法使攻击者直接获取身份验证令牌。利用此漏洞需要攻击者已持有先前颁发且尚未过期的有效令牌。实际影响取决于该被攻破令牌所关联的权限。客户用户令牌的权限仅限于受
Possible ATT&CK Techniques 1 AI
T1528 · Steal Application Access TokenAffected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| OTRS GmbH (former OTRS AG) | OTRS | 7.0.x |
affected |
8.0.x |
affected | ||
2023.x |
affected | ||
2024.x |
affected | ||
2025.x |
affected | ||
2026.x≤ 2026.6.x |
affected |
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I. Basic Information for CVE-2026-78357
Vulnerability Information
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Vulnerability Title
Insufficient Session Revocation for JWT Authentication
Source: CVE Program / CVE List V5
Vulnerability Description
Previously 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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的会话过期机制
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| OTRS GmbH (former OTRS AG) | OTRS | 7.0.x | - |
|
II. Public POCs for CVE-2026-78357
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-78357 (1)
Same Patch Batch · OTRS GmbH (former OTRS AG) · 2026-10-12 · 9 CVEs total
| CVE-2026-93582 | 9.4 CRITICAL | Authentication Bypass via Spoofed Remote-User Header in HTTP Basic Authentication |
| CVE-2026-78355 | 8.7 HIGH | Path Traversal in SendSupportBundle allows File Deletion Outside the Intended Directory |
| CVE-2026-93581 | 6.1 MEDIUM | Insufficient Neutralization of Formula Elements in CSV Exports |
| CVE-2026-48211 | 5.4 MEDIUM | Cross-Site Request Forgery in Import/Export Admin console |
| CVE-2026-78359 | 5.4 MEDIUM | Duplicate Identity / Identity Shadowing across CustomerUser backends |
| CVE-2026-78356 | 5.3 MEDIUM | Unauthenticated Disclosure of Agent Frontend Configuration |
| CVE-2026-48212 | 4.8 MEDIUM | Stored XSS in external pages |
| CVE-2026-78358 | 4.3 MEDIUM | Cross-Site Request Forgery in Administrative Actions |
IV. Related Vulnerabilities
Same product: OTRS
-
CVE-2026-93582
Authentication Bypass via Spoofed Remote-User Header in HTTP -
CVE-2026-93581
Insufficient Neutralization of Formula Elements in CSV Expor -
CVE-2026-78359
Duplicate Identity / Identity Shadowing across CustomerUser -
CVE-2026-78358
Cross-Site Request Forgery in Administrative Actions -
CVE-2026-78356
Unauthenticated Disclosure of Agent Frontend Configuration
Same vendor: OTRS GmbH (former OTRS AG)
-
CVE-2026-93582
Authentication Bypass via Spoofed Remote-User Header in HTTP -
CVE-2026-93581
Insufficient Neutralization of Formula Elements in CSV Expor -
CVE-2026-78359
Duplicate Identity / Identity Shadowing across CustomerUser -
CVE-2026-78358
Cross-Site Request Forgery in Administrative Actions -
CVE-2026-78356
Unauthenticated Disclosure of Agent Frontend Configuration
Same weakness: CWE-613
-
CVE-2026-107371
Missing Verification of auth_time Claim in auth0.js -
CVE-2026-74037
Wazuh 4.0.0 before 4.14.8 Session Invalidation Bypass in che -
CVE-2026-84321
Nginx UI: Standalone short tokens survive administrative rev -
CVE-2026-109362
Heym v0.0.5 before v0.0.113 Broken Access Control via Workfl -
CVE-2026-109320
Grav API Plugin before 1.0.36 Disabled Account Session Acces
V. Comments for CVE-2026-78357
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