CIRCL MISP up to 2.5.47 Event Delegation dynamically-determined object attributes

Summaryinfo

A vulnerability marked as critical has been reported in CIRCL MISP up to 2.5.47. Affected by this vulnerability is an unknown functionality of the component Event Delegation. This manipulation causes dynamically-determined object attributes. This vulnerability is handled as CVE-2026-103235. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in CIRCL MISP up to 2.5.47 and classified as critical. Affected by this vulnerability is an unknown code of the component Event Delegation. The manipulation with an unknown input leads to a dynamically-determined object attributes vulnerability. The CWE definition for the vulnerability is CWE-915. The product receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

MISP contains a mass assignment vulnerability in the event delegation feature. When a user with delegation permission submits a delegation request, the application authorized the user against the event identified in the URL but then persisted the entire submitted record, including caller-supplied fields such as the primary key and event_id. An authenticated attacker could inject a primary key or event_id into the delegation payload to retarget an existing delegation record to any event on the instance. Because a delegation row grants the requesting organisation read access to the event it references, this effectively granted read access to arbitrary events belonging to other organisations. If the target organisation subsequently accepted the delegation, ownership of the event was transferred and the original record was deleted. Preconditions: - An authenticated user with the delegation permission (perm_delegate) - The MISP.delegation server setting must be enabled Impact: - Confidentiality: read access to any event on the instance - Integrity: overwriting existing delegation records and transferring event ownership Affected versions: MISP < 2.5.48

The advisory is shared at github.com. This vulnerability is known as CVE-2026-103235 since 09/30/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 2.5.48 eliminates this vulnerability. Applying the patch d1f5684f9 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• CIRCL

Name

• MISP

Version

• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7
• 2.5.8
• 2.5.9
• 2.5.10
• 2.5.11
• 2.5.12
• 2.5.13
• 2.5.14
• 2.5.15
• 2.5.16
• 2.5.17
• 2.5.18
• 2.5.19
• 2.5.20
• 2.5.21
• 2.5.22
• 2.5.23
• 2.5.24
• 2.5.25
• 2.5.26
• 2.5.27
• 2.5.28
• 2.5.29
• 2.5.30
• 2.5.31
• 2.5.32
• 2.5.33
• 2.5.34
• 2.5.35
• 2.5.36
• 2.5.37
• 2.5.38
• 2.5.39
• 2.5.40
• 2.5.41
• 2.5.42
• 2.5.43
• 2.5.44
• 2.5.45
• 2.5.46
• 2.5.47

License

• open-source

CPE 2.3info

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CPE 2.2info

• 🔒
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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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