Continued account access via unrevoked JWTs
Published Oct 12, 2026 · Updated Oct 12, 2026
Session revocation failure in OTRS JWT authentication allows remote authenticated users to retain account access via existing tokens. The authentication mechanism continues accepting previously issued JWTs after account deactivation or password changes until normal expiration, approximately 16 hours later. Exploitation requires possession of a still-valid token obtained beforehand and retains only the affected agent or customer account's assigned permissions; the flaw does not issue tokens.
Summary
What happened
Session revocation failure in OTRS JWT authentication allows remote authenticated users to retain account access via existing tokens. The authentication mechanism continues accepting previously issued JWTs after account deactivation or password changes until normal expiration, approximately 16 hours later. Exploitation requires possession of a still-valid token obtained beforehand and retains only the affected agent or customer account's assigned permissions; the flaw does not issue tokens.
The record
- CVE
- CVE-2026-78357
- Published
- Oct 12, 2026
- Updated
- Oct 12, 2026
- Vendor
- Centuran Consulting
- Product
- OTRS
- Classifications
- T1550.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 12, 2026CVE publishedPublication date reported by the CVE source.
- Oct 12, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2023.x
- Affected versionversion=2024.x
- Affected versionversion=2025.x
- Affected versionversion=2026.x <=2026.6.x
- Affected versionversion=7.0.x
- Affected versionversion=8.0.x
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Get started to see how Hinoki identifies affected software and validates exploitability in your environment.
Get started