GCVE-1-2026-20182 (CVE-2026-95697)
Vulnerability from gna-1 – Published: 2026-09-22 14:31 – Updated: 2026-09-22 14:31
VLAI
EPSS
VEX
Title
MISP: Insufficient Authorization Allows Sharing Group Editors to Overwrite Organization Metadata
Summary
MISP contains an authorization flaw in the Organisation model's captureOrg method. When the $force parameter is set to true, the method unconditionally overwrites organization metadata fields without verifying that the invoking user holds sufficient privileges. A user with a sharing group (SG) editor role can trigger this code path, allowing them to modify organization metadata that should be restricted to site administrators or users with sync permissions.
According to the commit message, this could lead to blueprint-based sharing group manipulation, meaning an attacker with SG editor access could alter organizational attributes in ways that influence how sharing groups and blueprints behave across the MISP instance.
The vulnerability requires an authenticated user with at least SG editor privileges and network access to the MISP web interface. The impact is primarily on the integrity of organization records and, potentially, on the integrity of sharing group configurations derived from those records.
Severity
CWE
- CWE-862 - Missing Authorization
Assigner
GNA-1
This instance
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/f3ec974ee | patch |
Impacted products
GCVE extensions
AI-generated
Human-reviewed
Confidence: medium
Model
qwen3.8:27b
advisory
bcp-05-x-01bcp-05-x-02
AI involvement
GCVE-BCP-05-X-01
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.pyon 2026-09-22 14:23 - Model
qwen3.8:27b- Input
-
https://github.com/MISP/MISP/commit/f3ec974ee.patch
63108ba85f58… - Confidence
- medium
| Commit | Subject | Patch SHA-256 |
|---|---|---|
f3ec974ee2d7
|
fix: [security] overwrite of org metadata by sg editors | 63108ba85f58… |
Fix summary
The fix adds an authorization check to the captureOrg method so that the forced overwrite of organization metadata fields is only permitted when the invoking user holds either the site_admin permission or the sync permission. This ensures that low-privilege roles such as sharing group editors can no longer trigger the metadata overwrite path, closing the authorization gap.
Patch summary
In app/Model/Organisation.php, the condition guarding the forced overwrite of organization metadata fields (type, date_created, date_modified, nationality, sector, contacts) was changed from a simple 'if ($force)' check to 'if ($force && (!empty($user['Role']['perm_site_admin']) || !empty($user['Role']['perm_sync'])))'. This one-line change adds a role-based authorization requirement so that only site administrators or sync-permitted users can execute the metadata overwrite when $force is true.
CVSS rationale
AV:N: MISP is a network-accessible web application. AC:L: The attack requires only calling the existing captureOrg function with $force=true; no race conditions or complex bypasses are needed. AT:N: No user interaction or attack tooling beyond normal API usage is required. PR:L: The attacker needs an authenticated account with at least SG editor privileges, which is a low-privilege role in MISP. UI:N: No victim interaction is required. VC:N: No confidentiality impact is evident from the patch. VI:H: Organization metadata (type, nationality, sector, contacts, dates) can be arbitrarily modified, representing high integrity impact on the vulnerable component. VA:N: No availability impact. SC:N: No direct confidentiality impact on other systems. SI:H: The commit message explicitly notes the issue 'could lead to blueprint based SG manipulation,' indicating integrity impact extends to sharing group configurations in the broader MISP ecosystem. SA:N: No availability impact on other systems.
Weakness rationale
- CWE-862 The captureOrg method performed a privileged operation (overwriting organization metadata) based solely on the $force flag without verifying that the authenticated user held the necessary permission (site_admin or sync). The authorization check was entirely absent for this code path, which is the definition of a missing authorization vulnerability.
Attack pattern rationale
- CAPEC-100 The closest plausible CAPEC is Parameter Tampering: an authenticated user with a lower-privilege role (SG editor) invokes the captureOrg function with the $force parameter set to true, triggering a code path that was intended only for higher-privilege users. The user manipulates a function parameter to cause unintended privileged behavior. This mapping is approximate because the core issue is a missing authorization check rather than classic parameter tampering, but no CAPEC entry more precisely describes an authenticated user exploiting a missing permission gate via a boolean flag.
Assumptions to verify
- The affected version boundary is inferred from the tag_version_boundary metadata (v2.5.47, 139 commits after fix), suggesting the fix landed in or before v2.5.47. The exact first affected version is not specified in the patch.
- The 'blueprint based SG manipulation' impact mentioned in the commit message is taken at face value for the SI:H rating; the patch itself only shows the org metadata overwrite fix and does not include code demonstrating the SG manipulation path.
- CAPEC-100 (Parameter Tampering) is the closest available mapping; the vulnerability is more precisely a missing authorization check (CWE-862) than a classic parameter tampering scenario, but no CAPEC entry directly models 'authenticated user exploits missing permission gate via a boolean flag.'
- The PR:L rating assumes that SG editor is a low-privilege role in MISP's permission hierarchy; the patch references perm_site_admin and perm_sync as the required higher-level permissions, implying SG editor is below that level.
- No specific MISP version range is confirmed beyond the v2.5.47 tag boundary; earlier versions may or may not be affected depending on when the captureOrg method was introduced.
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 |
5 | 9 | medium | 5 |
{
"containers": {
"cna": {
"affected": [
{
"modules": [
"Organisation model (app/Model/Organisation.php)"
],
"product": "MISP",
"programFiles": [
"app/Model/Organisation.php"
],
"repo": "https://github.com/MISP/MISP",
"vendor": "MISP",
"versions": [
{
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"status": "affected",
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]
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{
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"value": "\u003cp\u003eMISP contains an authorization flaw in the Organisation model\u0027s captureOrg method. When the $force parameter is set to true, the method unconditionally overwrites organization metadata fields without verifying that the invoking user holds sufficient privileges. A user with a sharing group (SG) editor role can trigger this code path, allowing them to modify organization metadata that should be restricted to site administrators or users with sync permissions.\u003c/p\u003e\u003cp\u003eAccording to the commit message, this could lead to blueprint-based sharing group manipulation, meaning an attacker with SG editor access could alter organizational attributes in ways that influence how sharing groups and blueprints behave across the MISP instance.\u0026nbsp;\u003c/p\u003e\u003cp\u003eThe vulnerability requires an authenticated user with at least SG editor privileges and network access to the MISP web interface. The impact is primarily on the integrity of organization records and, potentially, on the integrity of sharing group configurations derived from those records.\u003c/p\u003e"
}
],
"value": "MISP contains an authorization flaw in the Organisation model\u0027s captureOrg method. When the $force parameter is set to true, the method unconditionally overwrites organization metadata fields without verifying that the invoking user holds sufficient privileges. A user with a sharing group (SG) editor role can trigger this code path, allowing them to modify organization metadata that should be restricted to site administrators or users with sync permissions.\n\nAccording to the commit message, this could lead to blueprint-based sharing group manipulation, meaning an attacker with SG editor access could alter organizational attributes in ways that influence how sharing groups and blueprints behave across the MISP instance.\u00a0\n\nThe vulnerability requires an authenticated user with at least SG editor privileges and network access to the MISP web interface. The impact is primarily on the integrity of organization records and, potentially, on the integrity of sharing group configurations derived from those records."
}
],
"impacts": [
{
"capecId": "CAPEC-100",
"descriptions": [
{
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"value": "CAPEC-100 Parameter Tampering"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
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"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "LOW",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-862",
"description": "CWE-862 Missing Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"orgId": "00000000-0000-4000-9000-000000000000"
},
"references": [
{
"name": "Security patch",
"tags": [
"patch"
],
"url": "https://github.com/MISP/MISP/commit/f3ec974ee"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eThe fix adds an authorization check to the captureOrg method so that the forced overwrite of organization metadata fields is only permitted when the invoking user holds either the site_admin permission or the sync permission. This ensures that low-privilege roles such as sharing group editors can no longer trigger the metadata overwrite path, closing the authorization gap.\u003c/p\u003e"
}
],
"value": "The fix adds an authorization check to the captureOrg method so that the forced overwrite of organization metadata fields is only permitted when the invoking user holds either the site_admin permission or the sync permission. This ensures that low-privilege roles such as sharing group editors can no longer trigger the metadata overwrite path, closing the authorization gap."
}
],
"title": "MISP: Insufficient Authorization Allows Sharing Group Editors to Overwrite Organization Metadata",
"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",
"name": "qwen3.8:27b",
"source": "ollama"
}
],
"review_status": "full",
"scope": "record",
"tags": [
"ai-computer-assisted:llm-generated",
"ai-computer-assisted:classification"
]
}
]
},
"bcp-05-x-02": {
"x_patch2vuln": {
"assumptions": [
"The affected version boundary is inferred from the tag_version_boundary metadata (v2.5.47, 139 commits after fix), suggesting the fix landed in or before v2.5.47. The exact first affected version is not specified in the patch.",
"The \u0027blueprint based SG manipulation\u0027 impact mentioned in the commit message is taken at face value for the SI:H rating; the patch itself only shows the org metadata overwrite fix and does not include code demonstrating the SG manipulation path.",
"CAPEC-100 (Parameter Tampering) is the closest available mapping; the vulnerability is more precisely a missing authorization check (CWE-862) than a classic parameter tampering scenario, but no CAPEC entry directly models \u0027authenticated user exploits missing permission gate via a boolean flag.\u0027",
"The PR:L rating assumes that SG editor is a low-privilege role in MISP\u0027s permission hierarchy; the patch references perm_site_admin and perm_sync as the required higher-level permissions, implying SG editor is below that level.",
"No specific MISP version range is confirmed beyond the v2.5.47 tag boundary; earlier versions may or may not be affected depending on when the captureOrg method was introduced."
],
"capecRationale": [
{
"capecId": "CAPEC-100",
"rationale": "The closest plausible CAPEC is Parameter Tampering: an authenticated user with a lower-privilege role (SG editor) invokes the captureOrg function with the $force parameter set to true, triggering a code path that was intended only for higher-privilege users. The user manipulates a function parameter to cause unintended privileged behavior. This mapping is approximate because the core issue is a missing authorization check rather than classic parameter tampering, but no CAPEC entry more precisely describes an authenticated user exploiting a missing permission gate via a boolean flag."
}
],
"commit": "f3ec974ee2d72d77311dbb364c70f1aee83a58c2",
"confidence": "medium",
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Jeroen Pinoy"
},
{
"lang": "en",
"type": "remediation developer",
"value": "iglocska"
}
],
"cvssRationale": "AV:N: MISP is a network-accessible web application. AC:L: The attack requires only calling the existing captureOrg function with $force=true; no race conditions or complex bypasses are needed. AT:N: No user interaction or attack tooling beyond normal API usage is required. PR:L: The attacker needs an authenticated account with at least SG editor privileges, which is a low-privilege role in MISP. UI:N: No victim interaction is required. VC:N: No confidentiality impact is evident from the patch. VI:H: Organization metadata (type, nationality, sector, contacts, dates) can be arbitrarily modified, representing high integrity impact on the vulnerable component. VA:N: No availability impact. SC:N: No direct confidentiality impact on other systems. SI:H: The commit message explicitly notes the issue \u0027could lead to blueprint based SG manipulation,\u0027 indicating integrity impact extends to sharing group configurations in the broader MISP ecosystem. SA:N: No availability impact on other systems.",
"fixSummary": "The fix adds an authorization check to the captureOrg method so that the forced overwrite of organization metadata fields is only permitted when the invoking user holds either the site_admin permission or the sync permission. This ensures that low-privilege roles such as sharing group editors can no longer trigger the metadata overwrite path, closing the authorization gap.",
"generatedAt": "2026-09-22T14:23:51.691782Z",
"generator": "patch2vuln.py",
"model": "qwen3.8:27b",
"modelComparison": {
"rankings": [
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"agreementScore": 9,
"assumptionCount": 5,
"confidence": "medium",
"model": "qwen3.8:27b",
"score": 5
}
],
"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": "63108ba85f58bd5ec8318ea052879e536aaa83464f8ff4f90ef1d386913dc835",
"patchSummary": "In app/Model/Organisation.php, the condition guarding the forced overwrite of organization metadata fields (type, date_created, date_modified, nationality, sector, contacts) was changed from a simple \u0027if ($force)\u0027 check to \u0027if ($force \u0026\u0026 (!empty($user[\u0027Role\u0027][\u0027perm_site_admin\u0027]) || !empty($user[\u0027Role\u0027][\u0027perm_sync\u0027])))\u0027. This one-line change adds a role-based authorization requirement so that only site administrators or sync-permitted users can execute the metadata overwrite when $force is true.",
"patchTruncated": false,
"patches": [
{
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"source": "https://github.com/MISP/MISP/commit/f3ec974ee.patch",
"sourceUrl": "https://github.com/MISP/MISP/commit/f3ec974ee.patch",
"subject": "fix: [security] overwrite of org metadata by sg editors"
}
],
"source": "https://github.com/MISP/MISP/commit/f3ec974ee.patch",
"subject": "fix: [security] overwrite of org metadata by sg editors",
"tagVersionBoundary": {
"commits_after_fix": 139,
"repository": "https://github.com/MISP/MISP",
"tag": "v2.5.47",
"version": "2.5.47",
"version_type": "semver"
},
"weaknessRationale": [
{
"cweId": "CWE-862",
"rationale": "The captureOrg method performed a privileged operation (overwriting organization metadata) based solely on the $force flag without verifying that the authenticated user held the necessary permission (site_admin or sync). The authorization check was entirely absent for this code path, which is the definition of a missing authorization vulnerability."
}
]
}
}
},
"recordType": "advisory",
"vulnId": "GCVE-1-2026-20182"
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},
"cveMetadata": {
"assignerOrgId": "00000000-0000-4000-9000-000000000000",
"cveId": "CVE-2026-95697",
"datePublished": "2026-09-22T14:31:15.792405Z",
"dateReserved": "2026-09-22T14:31:23.351Z",
"dateUpdated": "2026-09-22T14:31:23.423452Z",
"state": "PUBLISHED",
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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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.
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.
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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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