CVE-2026-103321
- Source
- https://cve.org/CVERecord?id=CVE-2026-103321
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103321.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-103321
- Published
- 2026-09-30T12:19:01Z
- Modified
- 2026-10-28T02:31:06Z
- Severity
-
- 8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N CVSS Calculator
- Summary
- MISP Stored Cross-Site Scripting (XSS) via Unvalidated Event Graph Preview Image
- Details
-
MISP contains a stored cross-site script (XSS) vulnerability in the event graph preview feature.
The event graph preview image field was accepted and stored without server-side validation. On the client side, the stored value was rendered into an HTML img element's src attribute via string concatenation, allowing a crafted value to break out of the attribute context and inject arbitrary script.
Preconditions:
-
An authenticated MISP user with the ability to create or modify an event graph entry.
-
A second user (the victim) who views the event graph and triggers the preview popover.
Impact:
-
Execution of arbitrary JavaScript in the victim's browser within the MISP application context.
-
Potential theft of session tokens, cookies, or sensitive data accessible to the victim's browser.
-
Potential for performing actions on behalf of the victim within the MISP application.
Affected: MISP versions prior to the fix (commit applied after v2.5.48).
-
- Database specific
{ "cna_assigner": "CIRCL", "cwe_ids": [ "CWE-20", "CWE-79" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103321.json" }- References
Affected packages
Git / github.com/misp/misp
Affected ranges
- Type
- GIT
- Repo
- https://github.com/misp/misp
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "2.5.48" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "fixed": "92c7ccc43" } ], "source": "REFERENCES_COMMIT" } ] }