Vulnerability-Lookup

FKIE_CVE-2026-93296

Vulnerability from fkie_nvd - Published: 2026-09-17 17:18 - Updated: 2026-09-17 19:17

Severity

5.1 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Summary

MISP contains a stored cross-site scripting (XSS) vulnerability in the Overmind theme's statistics views. The event General card (event_general.ctp) and the server/feed preview card (preview_general.ctp) constructed donut chart legend labels by directly concatenating object name or category keys into an innerHTML string without HTML-encoding. Because MISP object names (e.g., attribute names, event names, or server/feed identifiers) are user-controllable by any authenticated user with sufficient permissions to create or modify such objects, an attacker could craft a name containing malicious markup (for example, a script tag or event-handler attribute). When any other user viewed the affected Overmind dashboard, the injected markup would be interpreted as live HTML/JavaScript in the victim's browser, executing in the context of the MISP application origin. This could allow session hijacking, data exfiltration, or arbitrary actions performed on behalf of the victim. The vulnerability requires the attacker to have low-level authenticated access to create or rename an object whose name is rendered in the legend, and the victim to view the Overmind event or server preview page. No special browser conditions or race conditions are required.

References

	URL	Tags
	5a6e4751-2f3f-4070-9419-94fb35b644e8	https://github.com/MISP/misp/commit/382188d2f

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "modules": [
            "Overmind theme - Events View (event_general.ctp)",
            "Overmind theme - Servers View (preview_general.ctp)"
          ],
          "product": "misp",
          "programFiles": [
            "app/View/Themed/Overmind/Elements/Events/View/event_general.ctp",
            "app/View/Themed/Overmind/Elements/Servers/View/preview_general.ctp"
          ],
          "repo": "https://github.com/MISP/misp",
          "vendor": "misp",
          "versions": [
            {
              "lessThan": "2.5.47",
              "status": "affected",
              "version": "unspecified",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "MISP contains a stored cross-site scripting (XSS) vulnerability in the Overmind theme\u0027s statistics views. The event General card (event_general.ctp) and the server/feed preview card (preview_general.ctp) constructed donut chart legend labels by directly concatenating object name or category keys into an innerHTML string without HTML-encoding. Because MISP object names (e.g., attribute names, event names, or server/feed identifiers) are user-controllable by any authenticated user with sufficient permissions to create or modify such objects, an attacker could craft a name containing malicious markup (for example, a script tag or event-handler attribute). When any other user viewed the affected Overmind dashboard, the injected markup would be interpreted as live HTML/JavaScript in the victim\u0027s browser, executing in the context of the MISP application origin. This could allow session hijacking, data exfiltration, or arbitrary actions performed on behalf of the victim. The vulnerability requires the attacker to have low-level authenticated access to create or rename an object whose name is rendered in the legend, and the victim to view the Overmind event or server preview page. No special browser conditions or race conditions are required."
    }
  ],
  "id": "CVE-2026-93296",
  "lastModified": "2026-09-17T19:17:07.877",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.1,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
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        "ssvcData": {
          "id": "CVE-2026-93296",
          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-17T18:06:22.658218Z",
          "version": "2.0.3"
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  "published": "2026-09-17T17:18:17.280",
  "references": [
    {
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "url": "https://github.com/MISP/misp/commit/382188d2f"
    }
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  "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
  "vulnStatus": "Deferred",
  "weaknesses": [
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          "value": "CWE-79"
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      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "type": "Secondary"
    }
  ]
}

CVE-2026-93296 (GCVE-0-2026-93296)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:29 – Updated: 2026-09-17 18:06

Title

MISP Overmind: Stored Cross-Site Scripting via Unescaped Object Names in Statistics Legends

Summary

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-17 18:06 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

CIRCL ENISA root

References

1 reference

URL	Tags
https://github.com/MISP/misp/commit/382188d2f	patch

Impacted products

1 product

Vendor	Product	Version
misp	misp	Affected: unspecified , < 2.5.47 (semver)

Credits

Jeroen Pinoy iglocska Claude Opus 4.8

GCVE extensions

AI-generated Human-reviewed Confidence: high Model qwen3.8:27b advisory bcp-05-x-01bcp-05-x-02

AI involvement GCVE-BCP-05-X-01

Whole record AI-generated Human-reviewed GNA-1

Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.

ai-computer-assisted:llm-generatedai-computer-assisted:classification

Model	Source	Identifier
qwen3.8:27b	ollama	`qwen3.8:27b`

Patch provenance GCVE-BCP-05-X-02

Generator: patch2vuln.py on 2026-09-17 16:28
Model: qwen3.8:27b
Input: https://github.com/MISP/misp/commit/382188d2f.patch 3c6f0376c712…
Confidence: high

Commit	Subject	Patch SHA-256
`382188d2f270`	fix: [security] Escape object names in the Overmind	`3c6f0376c712…`

Fix summary

The fix applies HTML output encoding to the user-controlled label variable (lbl) before it is interpolated into the innerHTML string in both affected view templates. By wrapping the label with escapeHtml(), any HTML metacharacters in object names are neutralized, preventing injected markup from being interpreted as executable HTML or JavaScript in the viewer's browser.

Patch summary

Two one-line changes in the Overmind theme view templates. In app/View/Themed/Overmind/Elements/Events/View/event_general.ctp (line 607) and app/View/Themed/Overmind/Elements/Servers/View/preview_general.ctp (line 323), the raw lbl variable used in the title attribute and inner text of the legend span element is replaced with escapeHtml(lbl). No other logic, routing, or configuration changes are made.

CVSS rationale

AV:N: The vulnerability is exploitable over the network via a web browser. AC:L: Exploitation requires only creating an object with a crafted name; no race or special conditions. AT:N: The attack targets the same MISP instance. PR:L: The attacker needs low-level authenticated access to create or rename an MISP object. UI:P: The victim passively interacts by viewing the Overmind dashboard page; no click or explicit action is needed beyond normal page rendering. VC/VI/VA:N: No direct impact on the MISP server's confidentiality, integrity, or availability. SC:H/SI:H: The injected script executes in the victim's browser within the MISP origin, enabling full session compromise (cookie theft, data exfiltration, arbitrary actions). SA:N: No availability impact on the victim's browser.

Weakness rationale

CWE-79 User-controlled object names are concatenated directly into an innerHTML string without HTML encoding, allowing injected markup to execute in the victim's browser. This is a textbook stored XSS via missing output encoding at an HTML sink.

Attack pattern rationale

CAPEC-1 The attack pattern involves injecting client-side script into a web application via user-controllable data (object names) that is rendered without encoding in an HTML context. CAPEC-1 is the canonical XSS attack pattern and directly matches the mechanism: attacker-controlled data flows into an innerHTML sink. No uncertainty in this mapping; the patch explicitly describes the innerHTML concatenation of unescaped labels.

Assumptions to verify

The exact affected version range is not explicitly stated in the patch; the tag_version_boundary indicates the fix commit is 55 commits after v2.5.47, suggesting versions up to (but not including) the release containing this commit are affected. The precise fixed version is unspecified.
PR:L assumes the attacker needs at least low-level authenticated access to create or rename a MISP object whose name appears in the Overmind legend. If unauthenticated object creation is possible in some deployment, PR could be N.
UI:P assumes the victim simply views the Overmind dashboard page (passive interaction). If the page requires a specific navigation action beyond normal browsing, UI could be A.
SC:H and SI:H assume the XSS grants full access to the victim's MISP session (cookies, API tokens, in-page data). A more conservative assessment could rate these L if the Overmind view exposes limited data.
The CAPEC-1 mapping is direct and unambiguous for this stored XSS; no uncertainty is noted beyond the standard CAPEC granularity.

Model comparison

Selected qwen3.8:27b by deterministic-consensus-v1
The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required.

Model	Score	Agreement	Confidence	Assumptions
`qwen3.8:27b`	6	9	high	5

Show details on NVD website

JSON

To clipboard

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        }
      ],
      "title": "MISP Overmind: Stored Cross-Site Scripting via Unescaped Object Names in Statistics Legends",
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    "assignerShortName": "CIRCL",
    "cveId": "CVE-2026-93296",
    "datePublished": "2026-09-17T16:29:19.457Z",
    "dateReserved": "2026-09-17T16:29:16.587Z",
    "dateUpdated": "2026-09-17T18:06:37.608Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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