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CVE-2026-104901

MISP ID Translator: Unescaped Remote Event ID Enables Cross-Site Scripting via Linked Server

5.1 Medium

MISP contains a cross-site scripting (XSS) vulnerability in the ID Translator feature. When a user views the ID Translator page, the application queries linked (remote) MISP servers for corresponding event identifiers. The event ID returned by the remote server was rendered in the HTML output without proper output encoding.

A malicious or compromised linked server could return a crafted event ID containing arbitrary HTML or JavaScript markup. This markup would be rendered in the browser of any user in the host organization who views the ID Translator page, enabling session hijacking, credential theft, or other client-side attacks.

Preconditions:

  • The victim must be an authenticated user of the host MISP instance.

  • A linked server must be configured on the host instance.

  • The victim must navigate to the ID Translator page for a given event.

Affected versions: <2.5.48.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Active

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
None

Exploit likelihood

0.32%Unchanged since Oct 3, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.1

MISP ID Translator: Unescaped Remote Event ID Enables Cross-Site Scripting via Linked Server

MISP contains a cross-site scripting (XSS) vulnerability in the ID Translator feature. When a user views the ID Translator page, the application queries linked (remote) MISP servers for corresponding event identifiers. The event ID returned by the remote server was rendered in the HTML output without proper output encoding.

A malicious or compromised linked server could return a crafted event ID containing arbitrary HTML or JavaScript markup. This markup would be rendered in the browser of any user in the host organization who views the ID Translator page, enabling session hijacking, credential theft, or other client-side attacks.

Preconditions:

  • The victim must be an authenticated user of the host MISP instance.

  • A linked server must be configured on the host instance.

  • The victim must navigate to the ID Translator page for a given event.

Affected versions: <2.5.48.

Record
CVE-2026-104901
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2026-91672 5.1

MISP contains a cross-site scripting (XSS) vulnerability in the ID Translator feature. When a user views the ID Translator page, the application queries linked (remote) MISP servers for corresponding event identifiers. The event ID returned by the remote server was rendered in the HTML output without proper output encoding.

A malicious or compromised linked server could return a crafted event ID containing arbitrary HTML or JavaScript markup. This markup would be rendered in the browser of any user in the host organization who views the ID Translator page, enabling session hijacking, credential theft, or other client-side attacks.

Preconditions:

  • The victim must be an authenticated user of the host MISP instance.

  • A linked server must be configured on the host instance.

  • The victim must navigate to the ID Translator page for a given event.

Affected versions: <2.5.48.

Record
EUVD-2026-91672
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-gw6q-xmmq-vqpx 5.1

MISP contains a cross-site scripting (XSS) vulnerability in the ID Translator feature. When a...

MISP contains a cross-site scripting (XSS) vulnerability in the ID Translator feature. When a user views the ID Translator page, the application queries linked (remote) MISP servers for corresponding event identifiers. The event ID returned by the remote server was rendered in the HTML output without proper output encoding.

A malicious or compromised linked server could return a crafted event ID containing arbitrary HTML or JavaScript markup. This markup would be rendered in the browser of any user in the host organization who views the ID Translator page, enabling session hijacking, credential theft, or other client-side attacks.

Preconditions:

  • The victim must be an authenticated user of the host MISP instance.

  • A linked server must be configured on the host instance.

  • The victim must navigate to the ID Translator page for a given event.

Affected versions: <2.5.48.

Record
GHSA-gw6q-xmmq-vqpx
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-79
Updated
2026-11-02
NVD 5.1

MISP contains a cross-site scripting (XSS) vulnerability in the ID Translator feature. When a user views the ID Translator page, the application queries linked (remote) MISP servers for corresponding event identifiers. The event ID returned by the remote server was rendered in the HTML output without proper output encoding.

A malicious or compromised linked server could return a crafted event ID containing arbitrary HTML or JavaScript markup. This markup would be rendered in the browser of any user in the host organization who views the ID Translator page, enabling session hijacking, credential theft, or other client-side attacks.

Preconditions:

  • The victim must be an authenticated user of the host MISP instance.

  • A linked server must be configured on the host instance.

  • The victim must navigate to the ID Translator page for a given event.

Affected versions: <2.5.48.

Record
CVE-2026-104901
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-79
Updated
2026-11-02
OSV 5.1

MISP ID Translator: Unescaped Remote Event ID Enables Cross-Site Scripting via Linked Server

MISP contains a cross-site scripting (XSS) vulnerability in the ID Translator feature. When a user views the ID Translator page, the application queries linked (remote) MISP servers for corresponding event identifiers. The event ID returned by the remote server was rendered in the HTML output without proper output encoding.

A malicious or compromised linked server could return a crafted event ID containing arbitrary HTML or JavaScript markup. This markup would be rendered in the browser of any user in the host organization who views the ID Translator page, enabling session hijacking, credential theft, or other client-side attacks.

Preconditions:

  • The victim must be an authenticated user of the host MISP instance.

  • A linked server must be configured on the host instance.

  • The victim must navigate to the ID Translator page for a given event.

Affected versions: <2.5.48.

Record
CVE-2026-104901
CVSS 4.0
5.1 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Weakness
CWE-79
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-104901 is a medium vulnerability (CVSS 5.1) in Misp, published October 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 24th percentile. No source names a fixed version.

References

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