Vulnerability-Lookup

GHSA-RX79-G748-J44M

Vulnerability from github – Published: 2026-09-14 12:31 – Updated: 2026-09-14 12:31

Details

Affected versions of MISP’s interactive CLI shell implement access control independently from the normal web application, causing several authorization inconsistencies.

The patch shows that CLI access could differ from the web application in multiple security-sensitive areas:

- feed listings did not enforce the same lookup_visible restrictions for non-host-organisation users; - feed detail access did not enforce the same host-organisation/site-admin authorization as FeedsController::view(); - Feed.headers, which can contain HTTP authorization credentials, could be exposed instead of being hidden or masked; - server synchronization authkey values were not explicitly hidden from CLI detail output; - sharing-group detail access did not consistently use SharingGroup::checkIfAuthorised(); - the use command could establish context for a record without first proving that the user was authorized to view that record

The commit additionally hardens pagination and terminal rendering, including neutralization of terminal control sequences found in database-backed values. Those are important hardening changes, but the main vulnerability is the CLI authorization/data-disclosure mismatch.

Version affected: ≤2.5.45

Severity

8.4 (High)


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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90895"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-150"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-14T10:17:06Z",
    "severity": "HIGH"
  },
  "details": "Affected versions of MISP\u2019s interactive CLI shell implement access control independently from the normal web application, causing several authorization inconsistencies.\n\n\nThe patch shows that CLI access could differ from the web application in multiple security-sensitive areas:\n\n\u2003- feed listings did not enforce the same lookup_visible restrictions for non-host-organisation users;\n\u2003- feed detail access did not enforce the same host-organisation/site-admin authorization as FeedsController::view();\n\u2003- Feed.headers, which can contain HTTP authorization credentials, could be exposed instead of being hidden or masked;\n\u2003- server synchronization authkey values were not explicitly hidden from CLI detail output;\n\u2003- sharing-group detail access did not consistently use SharingGroup::checkIfAuthorised();\n\u2003- the use command could establish context for a record without first proving that the user was authorized to view that record\n\n\nThe commit additionally hardens pagination and terminal rendering, including neutralization of terminal control sequences found in database-backed values. Those are important hardening changes, but the main vulnerability is the CLI authorization/data-disclosure mismatch.\n\nVersion affected: \u22642.5.45",
  "id": "GHSA-rx79-g748-j44m",
  "modified": "2026-09-14T12:31:37Z",
  "published": "2026-09-14T12:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90895"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MISP/MISP/commit/cd9f548ed"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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",
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}

CVE-2026-90895 (GCVE-0-2026-90895)

Vulnerability from cvelistv5 – Published: 2026-09-14 09:40 – Updated: 2026-09-14 10:26

Title

MISP Interactive CLI Shell: Authorization Bypass, Credential Exposure, and Terminal Injection

Summary

Affected versions of MISP’s interactive CLI shell implement access control independently from the normal web application, causing several authorization inconsistencies. The patch shows that CLI access could differ from the web application in multiple security-sensitive areas: - feed listings did not enforce the same lookup_visible restrictions for non-host-organisation users; - feed detail access did not enforce the same host-organisation/site-admin authorization as FeedsController::view(); - Feed.headers, which can contain HTTP authorization credentials, could be exposed instead of being hidden or masked; - server synchronization authkey values were not explicitly hidden from CLI detail output; - sharing-group detail access did not consistently use SharingGroup::checkIfAuthorised(); - the use command could establish context for a record without first proving that the user was authorized to view that record The commit additionally hardens pagination and terminal rendering, including neutralization of terminal control sequences found in database-backed values. Those are important hardening changes, but the main vulnerability is the CLI authorization/data-disclosure mismatch. Version affected: ≤2.5.45

Severity

8.4 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 10:24 UTC

CWE

CWE-862 - Missing Authorization
CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
CWE-150 - Improper Neutralization of Escape, Quote, or Control Sequences
CWE-522 - Insufficiently Protected Credentials

Assigner

CIRCL ENISA root

References

1 reference

URL	Tags
https://github.com/MISP/MISP/commit/cd9f548ed	patch

Impacted products

1 product

Vendor	Product	Version
MISP	MISP	Affected: 0 , < 2.5.46 (semver)

Credits

Scottish Government - National Cyber Team iglocska Claude Opus 4.8

GCVE extensions

AI-generated 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 Review: review 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 2026-09-14 09:16
Model: qwen3.8:27b
Input: https://github.com/MISP/MISP/commit/cd9f548ed.patch 1993ed3ac039…
Confidence: high

Commit	Subject	Patch SHA-256
`cd9f548ed808`	fix: [cli] Route interactive CLI shell authorization through	`1993ed3ac039…`

Fix summary

The fix replaces the shell's hand-rolled authorization logic with the same model-level accessors used by the web interface (Event::fetchSimpleEvent, MispAttribute::fetchAttributes, MispObject::fetchObjects, SharingGroup::checkIfAuthorised, Organisation::canSee), ensuring read and write operations enforce identical ACL rules. Credential columns are excluded at the query level via a hiddenFields mechanism so they are never fetched from the database. The inline detail editor now delegates to the entity-specific edit handlers, which enforce per-record write authorization. All terminal output passes through a sanitiser that neutralises C0/C1 control characters, ANSI escape sequences, and Unicode bidirectional overrides. Pagination is clamped to a safe range (1-1000) to prevent unbounded result sets.

Patch summary

Replaced hand-rolled ACL conditions in attribute, object, feed, sharing-group, and organisation queries with calls to the model's authorized fetch methods (fetchAttributes, fetchObjects, fetchSimpleEvent, checkIfAuthorised, canSee). Added hiddenFields configuration for server (authkey), feed (headers), and user (password, authkey, totp, hotp_counter, external_auth_key) so credential columns are excluded from SQL SELECT. Added __detailFields() to build the field list excluding hidden columns. Rewrote __editDetailField() to delegate to entity-specific edit handlers with a $fields parameter, eliminating the unguarded direct save(). Added __canWriteEntity() and __denyWrite() as a unified write-authorization gate for add/edit/delete. Added __term() sanitiser applied via overridden out()/err() methods and __termRows() for list data, neutralising C0/C1 controls, DEL, and Unicode bidi characters. Added __normalisePagination() to clamp limit to 1-1000 and page to >=1. Added __warnUnsupportedFilters() to report ignored

CVSS rationale

AV:L: The CLI shell is a local console command requiring SSH or local shell access to the MISP server. AC:L: No race conditions or special timing are needed; the unguarded write path and missing ACL checks are deterministic. AT:N: The authorization bypass and credential exposure require no target interaction. PR:L: Any authenticated MISP user with basic permissions (perm_add) can exploit the write bypass and read credential columns. UI:N: The core authorization bypass and data exposure do not require the victim to perform any action. VC:H: Sensitive credentials (feed HTTP auth, server sync key, user passwords/TOTP) are exposed. VI:H: An attacker can modify events, attributes, and objects they should not be able to change. VA:H: An attacker can read records (feeds, organisations, hidden tags) outside their authorized scope. SC/SI/SA:N: Impact is confined to the local MISP instance and its data.

Weakness rationale

CWE-862 The primary vulnerability: the inline detail editor saved records without enforcing per-record write authorization, and list/detail queries used incomplete ACL conditions that did not match the web interface's access rules. A user who could read a record could modify it, and could read records (feeds, organisations, tags) the web would not expose.
CWE-200 Credential columns (Feed.headers, Server.authkey, User.password/authkey/totp/hotp_counter/external_auth_key) were fetched from the database and exposed in CLI output to users who should not have access, and organisation/tag visibility settings were not enforced.
CWE-150 Database values containing ANSI escape sequences, C0/C1 control characters, or Unicode bidirectional override characters were printed verbatim to the terminal, allowing output forgery, window retitling, and visual manipulation of displayed indicators.
CWE-400 A limit value of zero, negative, or non-numeric caused the ORM to omit the SQL LIMIT clause, returning the entire table into memory and enabling denial of service.

Assumptions to verify

The CLI shell is accessible to any authenticated MISP user with local/SSH access to the server; no additional authentication layer is assumed.
The affected version range is not precisely bounded; the fix commit is 184 commits after tag v2.5.46, but the exact release version containing the fix is not stated in the patch metadata.
CVSS assumes the attacker already possesses a low-privilege MISP account and local shell access; remote exploitation without local access is not assessed.
The terminal injection impact (VC:H) is assessed on the basis that an analyst's terminal session is the primary trust boundary for indicator review; in automated/piped contexts the impact may be lower.
The unguarded write path is assessed as allowing modification of any readable record, not limited to specific entity types, based on the patch comment stating 'a user rewrite any record they could read'.

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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                ],
                "source": "https://github.com/MISP/MISP/commit/cd9f548ed.patch",
                "subject": "fix: [cli] Route interactive CLI shell authorization through",
                "tagVersionBoundary": {
                  "commits_after_fix": 184,
                  "repository": "https://github.com/MISP/MISP",
                  "tag": "v2.5.46",
                  "version": "2.5.46",
                  "version_type": "semver"
                },
                "weaknessRationale": [
                  {
                    "cweId": "CWE-862",
                    "rationale": "The primary vulnerability: the inline detail editor saved records without enforcing per-record write authorization, and list/detail queries used incomplete ACL conditions that did not match the web interface\u0027s access rules. A user who could read a record could modify it, and could read records (feeds, organisations, tags) the web would not expose."
                  },
                  {
                    "cweId": "CWE-200",
                    "rationale": "Credential columns (Feed.headers, Server.authkey, User.password/authkey/totp/hotp_counter/external_auth_key) were fetched from the database and exposed in CLI output to users who should not have access, and organisation/tag visibility settings were not enforced."
                  },
                  {
                    "cweId": "CWE-150",
                    "rationale": "Database values containing ANSI escape sequences, C0/C1 control characters, or Unicode bidirectional override characters were printed verbatim to the terminal, allowing output forgery, window retitling, and visual manipulation of displayed indicators."
                  },
                  {
                    "cweId": "CWE-400",
                    "rationale": "A limit value of zero, negative, or non-numeric caused the ORM to omit the SQL LIMIT clause, returning the entire table into memory and enabling denial of service."
                  }
                ]
              }
            }
          },
          "recordType": "advisory",
          "vulnId": "GCVE-1-2026-20058"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
    "assignerShortName": "CIRCL",
    "cveId": "CVE-2026-90895",
    "datePublished": "2026-09-14T09:40:55.800Z",
    "dateReserved": "2026-09-14T09:40:52.456Z",
    "dateUpdated": "2026-09-14T10:26:12.372Z",
    "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.