CVE-2026-104914 (GCVE-0-2026-104914)

Vulnerability from cvelistv5 – Published: 2026-10-02 16:09 – Updated: 2026-10-02 16:09
VLAI
Title
MISP: Soft-Deleted Attributes from Other Organizations Exposed via Attribute Search and Paginated View
Summary
MISP contains an improper access control vulnerability in its attribute search and paginated attribute view endpoints. When a user queries for soft-deleted attributes (e.g., via the deleted-attributes search or the paginated attribute listing), the application returned soft-deleted attributes belonging to events owned by other organizations to any authenticated user who had visibility of the event. The event detail view correctly restricted soft-deleted attribute visibility to the owning organization and sync-permission users, but the attribute search and paginated view code paths lacked this restriction. Preconditions: - An authenticated MISP user with at least read access to an event owned by another organization. - The user issues a query for deleted attributes (search or paginated view with the deleted filter). Impact: - Confidentiality: Soft-deleted threat intelligence attributes (e.g., IOCs, indicators, context) from other organizations are disclosed to unauthorized users. This may expose sensitive intelligence that the owning organization intended to remove from general visibility. Affected versions: MISP versions prior to v2.5.48.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
Supplier · CIRCL (v2.0.3)
Decision recorded 2026-10-02 16:06 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
MISP MISP Affected: 0 , < 2.5.48 (semver)
    cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
iglocska Claude Opus 5.5 (1M context) elhoim
GCVE extensions
bcp-05-x-01
AI-assisted vulnerability information annotation
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
bcp-05-x-02
Patch-to-vulnerability generation provenance
GCVE-BCP-05-X-02
Generator
patch2vuln.py on 2026-10-02 16:06
Model
qwen3.8:27b
Input
https://github.com/MISP/MISP/commit/bd81c23cf.patch 9673ee1d4db2…
Confidence
medium
Commit Subject Patch SHA-256
bd81c23cf2ac fix: [security] Show soft-deleted attributes only to the 9673ee1d4db2…
Fix summary

The fix enforces organizational ownership checks on soft-deleted attribute queries. When a user without sync permission requests deleted attributes, the query is now constrained to only return soft-deleted attributes whose parent event belongs to the requesting user's organization. This aligns the attribute search and paginated view behavior with the existing event view authorization logic.

Patch summary

Two code paths were modified:1. Event.php (fetchPaginatedAttributes): When the deleted filter is active and the user lacks perm_sync, an additional subquery condition is appended requiring the event owner's org_id to match the user's org_id. The original blanket deleted=0 or deleted=1 condition is replaced with an OR/AND structure that permits non-deleted attributes for all users but restricts deleted attributes to the owning org.2. MispAttribute.php (fetchAttributes): In the deleted='only' branch, when the user lacks perm_sync, an additional AND condition Event.org_id = user.org_id is added to the query conditions, scoping results to the user's own organization.

CVSS rationale

AV:N: The vulnerability is exploitable over the network via the MISP web API. AC:L: Exploitation requires only a standard query with the deleted-attribute filter; no race conditions or complex setup. AT:N: No special attack requirements. PR:L: An authenticated user with at least read access to an event owned by another organization is required. UI:N: No victim interaction needed; the data is returned in the API response. VC:L: Confidentiality impact is limited to soft-deleted attributes (a subset of event data) from other organizations; not all data is exposed. VI:N, VA:N: No integrity or availability impact on the vulnerable component. SC:N, SI:N, SA:N: No impact on subsequent components.

Weakness rationale
  • CWE-862 The attribute search and paginated view code paths were missing the authorization check that restricts soft-deleted attribute visibility to the owning organization. The event view had this check, but the attribute-level query paths did not, allowing any user with event visibility to retrieve soft-deleted attributes from other organizations.
  • CWE-284 More broadly, the application failed to enforce proper access control boundaries between organizations when serving soft-deleted attribute data through specific query endpoints, resulting in cross-organizational information disclosure.
Attack pattern rationale
  • CAPEC-126 This CAPEC describes leveraging legitimate application code paths to access or manipulate data beyond intended permissions. The attacker uses the legitimate attribute search and paginated view endpoints (executable code paths) to retrieve soft-deleted attributes from other organizations. The mapping is imperfect because CAPEC-126 emphasizes data alteration, whereas this vulnerability is purely an information disclosure. However, among available CAPEC patterns, this is the closest match for exploiting a legitimate code path to bypass intended access restrictions. No CAPEC specifically covers 'information disclosure via missing authorization in a query endpoint' with greater precision.
Assumptions to verify
  • The exact fixed version is not specified in the patch metadata; the fix commit is 37 commits after the v2.5.48 tag, so the fixed release is post-2.5.48 but the exact version number is unknown.
  • PR:L assumes the attacker needs at least read access to an event owned by another organization; if MISP deployments restrict cross-org event visibility more tightly, the effective privilege requirement may be higher.
  • CAPEC-126 is the closest available mapping but is not a perfect fit; the vulnerability is an information disclosure via missing authorization rather than data alteration.
  • VC:L assumes the exposure is limited to soft-deleted attributes (a subset of event data) and does not include active attributes or full event metadata.
  • The patch does not specify whether this affects all MISP deployments or only multi-organization configurations; the CVSS assumes a multi-org deployment where cross-org visibility is possible.
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 7 11 medium 5
bcp-05-x-03
Vulnerability handling and disclosure timeline
GCVE-BCP-05-X-03
  1. 2026-09-24 11:57 UTC Fix developed Corrective change authored (bd81c23cf2aced3c72766369dc813612edd52509): fix: [security] Show soft-deleted attributes only to the
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          "ssvcV203": [
            {
              "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
              "ssvcData": {
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "Supplier",
                "timestamp": "2026-10-02T16:06:38Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-10-02T16:16:49.280",
        "references": [
          {
            "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
            "url": "https://github.com/MISP/MISP/commit/bd81c23cf"
          },
          {
            "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
            "url": "https://github.com/elhoim"
          }
        ],
        "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-284"
              },
              {
                "lang": "en",
                "value": "CWE-862"
              }
            ],
            "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.



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.