CVE-2026-78356Network attack vector

Unauthenticated disclosure via unprotected frontend configuration endpoint

Published Oct 12, 2026 · Updated Oct 12, 2026

Information disclosure in the OTRS Agent Frontend allows remote attackers to read internal configuration via an unauthenticated endpoint. The configuration endpoint returns data intended for authenticated agents without requiring authentication, exposing installation details such as routes, authorization groups, and enabled features. Exploitation requires network access to the endpoint; the disclosure supports fingerprinting but does not directly expose user credentials or permit configuration changes.

CVSS severity5.3
Medium
EPSS probability0.28%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the OTRS Agent Frontend allows remote attackers to read internal configuration via an unauthenticated endpoint. The configuration endpoint returns data intended for authenticated agents without requiring authentication, exposing installation details such as routes, authorization groups, and enabled features. Exploitation requires network access to the endpoint; the disclosure supports fingerprinting but does not directly expose user credentials or permit configuration changes.

The record

CVE
CVE-2026-78356
Published
Oct 12, 2026
Updated
Oct 12, 2026
Vendor
OTRS GmbH
Product
OTRS
Classifications
CWE-497, CAPEC-170, T1592.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 2026CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=2023.x
  2. Affected versionversion=2024.x
  3. Affected versionversion=2025.x
  4. Affected versionversion=2026.x <=2026.6.x
  5. Affected versionversion=8.0.x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OTRS GmbH · OTRSversion=2023.x; version=2024.x; version=2025.x; version=2026.x <=2026.6.x; version=8.0.x

Published CVSS scores

5.3OTRSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-497Exposure of Sensitive System Information to an Unauthorized Control Sphere
CAPEC-170Web Application Fingerprinting
T1592.002Gather Victim Host Information: Software

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

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