GCVE-1-2026-20065 (CVE-2026-95701)

Vulnerability from gna-1 – Published: 2026-09-22 14:44 – Updated: 2026-09-22 14:44
VLAI
Title
MISP Path Traversal via Organization Name in Org-Statistics Logo Check
Summary
In MISP, the __statisticsOrgs method in UsersController.php used the organization name directly as a file-system path component when checking for the existence of an organization logo image. The original code called file_exists() with a path constructed as APP . 'webroot' . DS . 'img' . DS . 'orgs' . DS . $k . '.png', where $k is the organization name. Because the referenced directory (app/webroot/img/orgs) no longer exists in current MISP deployments (org logos were relocated to files/img/orgs), the check was functionally dead and never triggered. However, the underlying pattern—concatenating an attacker-influenced organization name into a file path without sanitization—constitutes a path traversal weakness. An organization name containing directory traversal sequences (e.g., '../../../../etc/passwd') would, if the target directory existed, allow an authenticated user with the ability to create or rename an organization to probe for the existence of arbitrary files on the server.
Severity
5.1 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
GNA-1 This instance
References
Impacted products
Vendor Product Version CPE status
MISP MISP Affected: 0 , < 2.5.47 (semver)
guessed Create a notification for this product.
Credits
Jeroen Pinoy iglocska Claude Opus 4.8
GCVE extensions
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 2026-09-22 14:38
Model
qwen3.8:27b
Input
https://github.com/MISP/MISP/commit/a2f7cba6e.patch 79f69959d0bc…
Confidence
medium
Commit Subject Patch SHA-256
a2f7cba6e74b fix: [ui] Point the org-statistics logo flag at the live 79f69959d0bc…
Fix summary

The fix corrects the logo directory path from the obsolete app/webroot/img/orgs to the current files/img/orgs location, expands the lookup to cover id, name, and uuid fields across png and svg extensions (mirroring the getOrgLogo helper), and adds a security guard: the candidate path is resolved with realpath() and verified via str_starts_with() against the resolved base directory, so any organization name containing traversal sequences (../) that would resolve outside files/img/orgs is rejected.

Patch summary

In app/Controller/UsersController.php __statisticsOrgs(): (1) added 'uuid' to the Organisation query fields; (2) replaced the single file_exists() call against APP/webroot/img/orgs/$k.png with a nested loop over fields [id, name, uuid] and extensions [png, svg]; (3) for each candidate, called realpath() on the full path and compared it with str_starts_with() against the realpath of the base directory (APP/files/img/orgs/), setting the logo flag only when the resolved path is confirmed to be inside that directory; (4) added a break 2 to exit both loops once a match is found.

CVSS rationale

AV:N – MISP is a network-accessible web application. AC:L – the traversal sequence in an org name is straightforward to construct. AT:N – no special target-side conditions beyond the org name being stored. PR:H – the attacker must have sufficient privileges to create or rename an organization (typically admin or org-admin role). UI:N – no user interaction required; the check fires server-side during statistics rendering. VC:L – the impact is limited to file-existence disclosure (boolean oracle); file contents are not read. VI:N, VA:N – no integrity or availability impact. SC/SI/SA:N – no secondary-system impact. Note: the vulnerability was latent in practice because the referenced directory did not exist, but the code pattern was exploitable if the directory were present or restored.

Weakness rationale
  • CWE-22 The organization name (an attacker-influenced string) was concatenated directly into a file-system path for a file_exists() check without any sanitization or directory-confinement validation. The fix explicitly guards against '../' sequences escaping the intended directory, confirming the weakness is path traversal.
Attack pattern rationale
  • CAPEC-1 The attack pattern involves manipulating a string value (the organization name) to inject path traversal sequences (../) that cause the application to reference files outside the intended directory. CAPEC-1 is the closest match because the core technique is crafting a string input to alter the application's file-path resolution. Uncertainty: CAPEC-126 (Leveraging Unintended Functionality) could also apply since the logo-existence check was an unintended side channel, but CAPEC-1 more directly describes the string-manipulation mechanism.
Assumptions to verify
  • The affected version range is inferred from the tag_version_boundary (v2.5.47, 50 commits after fix); the exact fixed release tag is not stated in the patch metadata, so 'less_than 2.5.47' is an approximation and may need CNA confirmation.
  • The vulnerability was latent in deployed instances because the referenced directory (app/webroot/img/orgs) did not exist; the CVSS reflects the code-level weakness rather than a confirmed active exploit.
  • PR:H assumes that creating or renaming an organization requires elevated privileges (admin or org-admin); if MISP allows lower-privileged users to set org names, PR could be lower.
  • CAPEC-1 (String Manipulation) is the closest available pattern; the exact CAPEC for path traversal via a stored string field is not explicitly enumerated in the CAPEC catalog, so this is a best-effort mapping.
  • The Co-Authored-By line references an AI assistant (Claude Opus 4.8); it is credited as a tool rather than a human remediation developer.
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
To clipboard 

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  "containers": {
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        },
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          "type": "remediation developer",
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            "Recovery": "NOT_DEFINED",
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            "attackRequirements": "NONE",
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            "privilegesRequired": "HIGH",
            "providerUrgency": "NOT_DEFINED",
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      ],
      "providerMetadata": {
        "orgId": "00000000-0000-4000-9000-000000000000"
      },
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          "name": "Security patch",
          "tags": [
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          "url": "https://github.com/MISP/MISP/commit/a2f7cba6e"
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        }
      ],
      "title": "MISP Path Traversal via Organization Name in Org-Statistics Logo Check",
      "x_gcve": [
        {
          "extensions": {
            "bcp-05-x-01": {
              "ai_annotations": [
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                  "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": [
                    {
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                      "identifier": "qwen3.8:27b",
                      "name": "qwen3.8:27b",
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                "assumptions": [
                  "The affected version range is inferred from the tag_version_boundary (v2.5.47, 50 commits after fix); the exact fixed release tag is not stated in the patch metadata, so \u0027less_than 2.5.47\u0027 is an approximation and may need CNA confirmation.",
                  "The vulnerability was latent in deployed instances because the referenced directory (app/webroot/img/orgs) did not exist; the CVSS reflects the code-level weakness rather than a confirmed active exploit.",
                  "PR:H assumes that creating or renaming an organization requires elevated privileges (admin or org-admin); if MISP allows lower-privileged users to set org names, PR could be lower.",
                  "CAPEC-1 (String Manipulation) is the closest available pattern; the exact CAPEC for path traversal via a stored string field is not explicitly enumerated in the CAPEC catalog, so this is a best-effort mapping.",
                  "The Co-Authored-By line references an AI assistant (Claude Opus 4.8); it is credited as a tool rather than a human remediation developer."
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                "cvssRationale": "AV:N \u2013 MISP is a network-accessible web application. AC:L \u2013 the traversal sequence in an org name is straightforward to construct. AT:N \u2013 no special target-side conditions beyond the org name being stored. PR:H \u2013 the attacker must have sufficient privileges to create or rename an organization (typically admin or org-admin role). UI:N \u2013 no user interaction required; the check fires server-side during statistics rendering. VC:L \u2013 the impact is limited to file-existence disclosure (boolean oracle); file contents are not read. VI:N, VA:N \u2013 no integrity or availability impact. SC/SI/SA:N \u2013 no secondary-system impact. Note: the vulnerability was latent in practice because the referenced directory did not exist, but the code pattern was exploitable if the directory were present or restored.",
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                    "sourceUrl": "https://github.com/MISP/MISP/commit/a2f7cba6e.patch",
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    "cveId": "CVE-2026-95701",
    "datePublished": "2026-09-22T14:44:11.001111Z",
    "dateReserved": "2026-09-22T14:44:19.514Z",
    "dateUpdated": "2026-09-22T14:44:19.846758Z",
    "state": "PUBLISHED",
    "vulnId": "GCVE-1-2026-20065"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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