Vulnerability-Lookup

FKIE_CVE-2026-104910

Vulnerability from fkie_nvd - Published: 2026-10-02 16:16 - Updated: 2026-10-02 16:16

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

Summary

MISP contains an authorization bypass in the related events listing functionality. When a user requests the list of events correlated to a given event, the system retrieved related event metadata directly from the correlation table without re-validating the caller's access rights against each related event. The correlation table stores a snapshot of the event's distribution level and sharing group at the time the correlation was created, and does not carry the published flag. As a result, events that the caller is not permitted to open—because they are unpublished, or because their distribution or sharing group has changed since the correlation was recorded—were still returned with their metadata (title, date, correlating value counts). Preconditions: - An authenticated user with access to at least one event in MISP. - The existence of correlation entries linking that event to other events the user should not be able to view. Impact: - Unauthorized disclosure of event metadata (titles, dates, correlation counts) for events the user has no right to access. - Potential reconnaissance of threat-intelligence event names and timelines across sharing groups. Affected: MISP versions prior to the fix commit (2ffa97f05).

References

	URL	Tags
	5a6e4751-2f3f-4070-9419-94fb35b644e8	https://github.com/MISP/MISP/commit/2ffa97f05

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "EventsController (viewRelatedEvents)",
            "Event model (getRelatedEvents)"
          ],
          "product": "MISP",
          "programFiles": [
            "app/Controller/EventsController.php",
            "app/Model/Event.php"
          ],
          "repo": "https://github.com/MISP/MISP",
          "vendor": "MISP",
          "versions": [
            {
              "lessThan": "2.5.48",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "MISP contains an authorization bypass in the related events listing functionality. When a user requests the list of events correlated to a given event, the system retrieved related event metadata directly from the correlation table without re-validating the caller\u0027s access rights against each related event.\n\nThe correlation table stores a snapshot of the event\u0027s distribution level and sharing group at the time the correlation was created, and does not carry the published flag. As a result, events that the caller is not permitted to open\u2014because they are unpublished, or because their distribution or sharing group has changed since the correlation was recorded\u2014were still returned with their metadata (title, date, correlating value counts).\n\nPreconditions:\n\n- An authenticated user with access to at least one event in MISP.\n\n- The existence of correlation entries linking that event to other events the user should not be able to view.\n\nImpact:\n\n- Unauthorized disclosure of event metadata (titles, dates, correlation counts) for events the user has no right to access.\n\n- Potential reconnaissance of threat-intelligence event names and timelines across sharing groups.\n\nAffected: MISP versions prior to the fix commit (2ffa97f05)."
    }
  ],
  "id": "CVE-2026-104910",
  "lastModified": "2026-10-02T16:16:48.920",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.3,
          "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": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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/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": "LOW",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "ssvcData": {
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "Supplier",
          "timestamp": "2026-10-02T15:59:27Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-10-02T16:16:48.813",
  "references": [
    {
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "url": "https://github.com/MISP/MISP/commit/2ffa97f05"
    }
  ],
  "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        },
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "type": "Secondary"
    }
  ]
}

CVE-2026-104910 (GCVE-0-2026-104910)

Vulnerability from cvelistv5 – Published: 2026-10-02 16:01 – Updated: 2026-10-02 16:01

Title

MISP Information Disclosure via Related Events Listing Bypassing Per-Event Authorization

Summary

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 15:59 UTC

CWE

CWE-862 - Missing Authorization
CWE-285 - Improper Authorization

Assigner

CIRCL ENISA root Scorecard

References

1 reference

URL	Tags
https://github.com/MISP/MISP/commit/2ffa97f05	patch

Impacted products

1 product

Vendor	Product	Version
MISP	MISP	Affected: 0 , < 2.5.48 (semver) cpe:2.3:a:misp:misp::::::::

Credits

Wenhao Wu iglocska Claude Opus 5 (1M context)

GCVE extensions

AI-generated Human-reviewed Confidence: medium Model qwen3.8:27b 1 event advisory bcp-05-x-01bcp-05-x-02bcp-05-x-03

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 15:59
Model: qwen3.8:27b
Input: https://github.com/MISP/MISP/commit/2ffa97f05.patch c315cbcd2cad…
Confidence: medium

Commit	Subject	Patch SHA-256
`2ffa97f0526c`	fix: [security] Scope the related event list to what the	`c315cbcd2cad…`

Fix summary

The fix enforces proper per-event authorization on the related events query by applying the user's full access-control conditions (including published status, distribution level, and sharing group membership) to the event lookup, rather than relying solely on the stale distribution snapshot stored in the correlation table. This ensures that only events the caller is currently permitted to read are returned in the related events list.

Patch summary

In EventsController.php (viewRelatedEvents) and Event.php (getRelatedEvents), the query that fetches related event metadata previously used only Event.id IN (relatedEventIds) as the condition. The patch replaces this with a call to createEventConditions($user), which builds the full set of authorization conditions (published flag, distribution, sharing group), and then adds the Event.id filter on top. The stale comment claiming ACL was enforced via the correlation table was removed. Two files changed, 8 insertions, 9 deletions.

CVSS rationale

AV:N: MISP is a network-accessible web application. AC:L: An authenticated user simply requests the related events endpoint; no race condition or complex manipulation is needed. AT:N: No attack-target manipulation required. PR:L: Requires a low-privilege authenticated user with access to at least one event. UI:N: No user interaction needed. VC:L: Disclosure is limited to event metadata (title, date, correlation counts), not full event content or attributes. VI:N, VA:N: No integrity or availability impact. SC:N, SI:N, SA:N: No secondary impacts on other systems. The overall score reflects a low-severity information disclosure requiring authentication.

Weakness rationale

CWE-862 The related events query did not apply the caller's per-event authorization checks (published status, distribution, sharing group). The system relied on a stale snapshot in the correlation table instead of re-validating access, effectively omitting the authorization step for the returned events.
CWE-285 Even though some authorization existed (via the correlation table snapshot), it was based on outdated data and lacked the published flag check, making the authorization decision incorrect for events whose access parameters had changed or that were unpublished.

Attack pattern rationale

CAPEC-126 The attacker leverages the trusted correlation relationship stored in the correlation table. The system treated the correlation entry as a sufficient authorization basis, but the snapshot data was stale and incomplete (missing published flag), allowing access to event metadata the caller should not see. This is the closest CAPEC to the pattern of relying on a trusted data source that does not reflect current authorization state. Uncertainty: no CAPEC perfectly describes 'stale authorization snapshot in a join table'; CAPEC-126 is the best available match.

Assumptions to verify

The tag_version_boundary (v2.5.48, 50 commits after fix) is used as an approximate upper bound for affected versions; exact version boundaries are not explicitly stated in the patch metadata.
PR:L assumes the attacker needs only a basic authenticated MISP account with access to at least one event; higher-privilege roles may be required depending on deployment configuration, but the patch does not specify this.
VC:L assumes the disclosed metadata (event titles, dates, correlation counts) constitutes a low confidentiality impact; in highly sensitive threat-intelligence environments the impact could be rated higher.
CAPEC-126 is the closest available mapping; no CAPEC precisely describes authorization bypass via a stale snapshot in a correlation/join table.
The 'published' flag and distribution/sharing group checks are assumed to be the primary authorization mechanisms in MISP's event model, based on the commit message and patch context.
No public exploit or active exploitation is assumed; the patch does not reference any CVE, advisory, or exploitation evidence.

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	11	medium	6

bcp-05-x-03

Vulnerability handling and disclosure timeline

GCVE-BCP-05-X-03

2026-09-22 13:14 UTC Fix developed Corrective change authored (2ffa97f0526cd6579b91a4dea560f6246ecbe108): fix: [security] Scope the related event list to what the https://github.com/MISP/MISP/commit/2ffa97f05.patch

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*"
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          "modules": [
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            "Event model (getRelatedEvents)"
          ],
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          ],
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          "type": "reporter",
          "value": "Wenhao Wu"
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          "type": "remediation developer",
          "value": "iglocska"
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          "value": "Claude Opus 5 (1M context)"
        }
      ],
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              "value": "\u003cp\u003eMISP contains an authorization bypass in the related events listing functionality. When a user requests the list of events correlated to a given event, the system retrieved related event metadata directly from the correlation table without re-validating the caller\u0027s access rights against each related event.\u003c/p\u003e\u003cp\u003eThe correlation table stores a snapshot of the event\u0027s distribution level and sharing group at the time the correlation was created, and does not carry the published flag. As a result, events that the caller is not permitted to open\u2014because they are unpublished, or because their distribution or sharing group has changed since the correlation was recorded\u2014were still returned with their metadata (title, date, correlating value counts).\u003c/p\u003e\u003cp\u003ePreconditions:\u003c/p\u003e\u003cp\u003e- An authenticated user with access to at least one event in MISP.\u003c/p\u003e\u003cp\u003e- The existence of correlation entries linking that event to other events the user should not be able to view.\u003c/p\u003e\u003cp\u003eImpact:\u003c/p\u003e\u003cp\u003e- Unauthorized disclosure of event metadata (titles, dates, correlation counts) for events the user has no right to access.\u003c/p\u003e\u003cp\u003e- Potential reconnaissance of threat-intelligence event names and timelines across sharing groups.\u003c/p\u003e\u003cp\u003eAffected: MISP versions prior to the fix commit (2ffa97f05).\u003c/p\u003e"
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            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
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            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
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            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
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                {
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                }
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              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-10-02T16:01:32.781Z",
        "orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "shortName": "CIRCL"
      },
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          "tags": [
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      "solutions": [
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            }
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          "value": "The fix enforces proper per-event authorization on the related events query by applying the user\u0027s full access-control conditions (including published status, distribution level, and sharing group membership) to the event lookup, rather than relying solely on the stale distribution snapshot stored in the correlation table. This ensures that only events the caller is currently permitted to read are returned in the related events list."
        }
      ],
      "title": "MISP Information Disclosure via Related Events Listing Bypassing Per-Event Authorization",
      "x_gcve": [
        {
          "extensions": {
            "bcp-05-x-01": {
              "ai_annotations": [
                {
                  "ai_level": "generated",
                  "description": "Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.",
                  "gna_source": 1,
                  "models": [
                    {
                      "gna_source": 1,
                      "identifier": "qwen3.8:27b",
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            },
            "bcp-05-x-02": {
              "x_patch2vuln": {
                "assumptions": [
                  "The tag_version_boundary (v2.5.48, 50 commits after fix) is used as an approximate upper bound for affected versions; exact version boundaries are not explicitly stated in the patch metadata.",
                  "PR:L assumes the attacker needs only a basic authenticated MISP account with access to at least one event; higher-privilege roles may be required depending on deployment configuration, but the patch does not specify this.",
                  "VC:L assumes the disclosed metadata (event titles, dates, correlation counts) constitutes a low confidentiality impact; in highly sensitive threat-intelligence environments the impact could be rated higher.",
                  "CAPEC-126 is the closest available mapping; no CAPEC precisely describes authorization bypass via a stale snapshot in a correlation/join table.",
                  "The \u0027published\u0027 flag and distribution/sharing group checks are assumed to be the primary authorization mechanisms in MISP\u0027s event model, based on the commit message and patch context.",
                  "No public exploit or active exploitation is assumed; the patch does not reference any CVE, advisory, or exploitation evidence."
                ],
                "capecRationale": [
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                    "rationale": "The attacker leverages the trusted correlation relationship stored in the correlation table. The system treated the correlation entry as a sufficient authorization basis, but the snapshot data was stale and incomplete (missing published flag), allowing access to event metadata the caller should not see. This is the closest CAPEC to the pattern of relying on a trusted data source that does not reflect current authorization state. Uncertainty: no CAPEC perfectly describes \u0027stale authorization snapshot in a join table\u0027; CAPEC-126 is the best available match."
                  }
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                "commit": "2ffa97f0526cd6579b91a4dea560f6246ecbe108",
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                "fixSummary": "The fix enforces proper per-event authorization on the related events query by applying the user\u0027s full access-control conditions (including published status, distribution level, and sharing group membership) to the event lookup, rather than relying solely on the stale distribution snapshot stored in the correlation table. This ensures that only events the caller is currently permitted to read are returned in the related events list.",
                "generatedAt": "2026-10-02T15:59:27.212571Z",
                "generator": "patch2vuln.py",
                "model": "qwen3.8:27b",
                "modelComparison": {
                  "rankings": [
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                      "agreementScore": 11,
                      "assumptionCount": 6,
                      "confidence": "medium",
                      "model": "qwen3.8:27b",
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                  "selectedModel": "qwen3.8:27b",
                  "selectionMethod": "deterministic-consensus-v1",
                  "selectionNotice": "The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required."
                },
                "patchSha256": "c315cbcd2cad3e0a5886680a4c6a903d9ed5f3fe3893670f74786cea77a56eb3",
                "patchSummary": "In EventsController.php (viewRelatedEvents) and Event.php (getRelatedEvents), the query that fetches related event metadata previously used only Event.id IN (relatedEventIds) as the condition. The patch replaces this with a call to createEventConditions($user), which builds the full set of authorization conditions (published flag, distribution, sharing group), and then adds the Event.id filter on top. The stale comment claiming ACL was enforced via the correlation table was removed. Two files changed, 8 insertions, 9 deletions.",
                "patchTruncated": false,
                "patches": [
                  {
                    "commit": "2ffa97f0526cd6579b91a4dea560f6246ecbe108",
                    "date": "Tue, 22 Sep 2026 15:14:32 +0200",
                    "patchSha256": "c315cbcd2cad3e0a5886680a4c6a903d9ed5f3fe3893670f74786cea77a56eb3",
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                    "sourceUrl": "https://github.com/MISP/MISP/commit/2ffa97f05.patch",
                    "subject": "fix: [security] Scope the related event list to what the"
                  }
                ],
                "source": "https://github.com/MISP/MISP/commit/2ffa97f05.patch",
                "ssvc": {
                  "options": [
                    {
                      "Exploitation": "none"
                    },
                    {
                      "Automatable": "yes"
                    },
                    {
                      "Technical Impact": "partial"
                    }
                  ],
                  "role": "Supplier",
                  "timestamp": "2026-10-02T15:59:27Z",
                  "version": "2.0.3"
                },
                "subject": "fix: [security] Scope the related event list to what the",
                "tagVersionBoundary": {
                  "commits_after_fix": 50,
                  "repository": "https://github.com/MISP/MISP",
                  "tag": "v2.5.48",
                  "version": "2.5.48",
                  "version_type": "semver"
                },
                "weaknessRationale": [
                  {
                    "cweId": "CWE-862",
                    "rationale": "The related events query did not apply the caller\u0027s per-event authorization checks (published status, distribution, sharing group). The system relied on a stale snapshot in the correlation table instead of re-validating access, effectively omitting the authorization step for the returned events."
                  },
                  {
                    "cweId": "CWE-285",
                    "rationale": "Even though some authorization existed (via the correlation table snapshot), it was based on outdated data and lacked the published flag check, making the authorization decision incorrect for events whose access parameters had changed or that were unpublished."
                  }
                ]
              }
            },
            "bcp-05-x-03": {
              "x_timeline": {
                "events": [
                  {
                    "description": "Corrective change authored (2ffa97f0526cd6579b91a4dea560f6246ecbe108): fix: [security] Scope the related event list to what the",
                    "id": "evt-fix-developed-1",
                    "references": [
                      "https://github.com/MISP/MISP/commit/2ffa97f05.patch"
                    ],
                    "timestamp": "2026-09-22T13:14:32Z",
                    "type": "fix-developed"
                  }
                ]
              }
            }
          },
          "recordType": "advisory",
          "vulnId": "GCVE-1-2026-20165"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
    "assignerShortName": "CIRCL",
    "cveId": "CVE-2026-104910",
    "datePublished": "2026-10-02T16:01:32.781Z",
    "dateReserved": "2026-10-02T16:01:26.599Z",
    "dateUpdated": "2026-10-02T16:01:32.781Z",
    "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.

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.

Action not permitted

FKIE_CVE-2026-104910

CVE-2026-104910 (GCVE-0-2026-104910)

AI-assisted vulnerability information annotation

Patch-to-vulnerability generation provenance

Fix summary

Patch summary

CVSS rationale

Weakness rationale

Attack pattern rationale

Assumptions to verify

Model comparison

Vulnerability handling and disclosure timeline

Tags

Sightings

Nomenclature

Related by attack behaviour