# CVE-2026-112183: MISP CSS injection in remote event preview

Source: https://junglewise.ai/threats/cve-2026-112183-misp-contains-a-css-injection-vulnerability-in-the-remote-event  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-19. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-112183 · Severity: info · Published 2026-10-19

MISP is a threat intelligence sharing platform that allows organizations to exchange malware indicators and event data. A CSS injection vulnerability in the remote event preview feature allows an attacker who controls a linked MISP server to inject arbitrary CSS by crafting malicious tag colour values. When users view a preview of events from the compromised linked server, the injected CSS could manipulate the user interface or perform limited information disclosure through CSS-based attacks.

Technologies: [Misp](https://junglewise.ai/threats/technologies/misp). Vendors: [Misp](https://junglewise.ai/threats/vendors/misp).

## Quick answers

**Is CVE-2026-112183 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-112183 being exploited in the wild.

**How severe is CVE-2026-112183?** Informational severity, published 19 October 2026.

**Which products and versions are affected?** Misp before 2.5.48.

**Is there a fix for CVE-2026-112183?** Yes: fixed in 2.5.48. Until then: Restrict the ability to create or modify tags on linked MISP servers, or review access controls for remote server relationships until an upgrade is possible. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-112183 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-112183?** Check whether you run Misp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.5.48

Restrict the ability to create or modify tags on linked MISP servers, or review access controls for remote server relationships until an upgrade is possible.

## Technical details

The vulnerability exists in the remote event preview functionality where tag colour values are written directly into inline CSS style attributes with insufficient validation. Although HTML entity encoding is applied, the value is interpreted as CSS within the style attribute, enabling CSS injection. An attacker with tag creation/modification privileges on a linked MISP instance can craft payloads that execute when a local user previews a remote event.

## Affected products

- MISP MISP before 2.5.48

## Timeline

- 2026-10-19: disclosed
- 2026-10-19: patched: Fix committed to repository validating colour values as hex format only

## References

- [https://github.com/MISP/MISP/commit/91323b517](https://github.com/MISP/MISP/commit/91323b517)

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