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CVE-2026-61843

Status: DeferredHigh (8.2)—
Severity8.2High · CVSS 3.1
Exploitation probability0.31 %higher than 22% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.18.0, FileRise upload-enabled shared-folder and upload-only links do not reject a destination filename that already exists. An unauthenticated visitor with a valid share token and any configured share password can upload a file with the same name as an existing file and silently replace its content while the original uploader metadata remains. The same replacement gap affects ordinary authenticated uploads through /api/upload/upload.php and authenticated upload-only users who lack edit authority over the existing file. This issue is fixed in version 3.18.0.

CVSS

Base score
8.2
Version
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.31 %
Percentile among all scored CVEs
22
Score date
10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector AV:N/PR:N/UI:N; sin cuenta, un token de enlace compartido permite sobrescribir archivos existentes (I:H). Se descarta T1078 de la pista: no hay credenciales de cuenta.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

ATT&CK mitigations that cover these techniques

Vulnerability ScanningRestrict File and Directory PermissionsPrivileged Account ManagementRemote Data StorageNetwork SegmentationLimit Access to Resource Over Network

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Filerise — FileriseAI

CWEs

References

Show 4 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-61843",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2026-61843",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-15T15:05:37.325468Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
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          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.2,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "error311",
          "product": "FileRise",
          "versions": [
            {
              "status": "affected",
              "version": "< 3.18.0"
            }
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        }
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  ],
  "published": "2026-10-14T21:17:37.947",
  "references": [
    {
      "url": "https://github.com/error311/FileRise/commit/9ed1a38f00918849dbda30f54291d1451ed80d11",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/error311/FileRise/releases/tag/v3.18.0",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/error311/FileRise/security/advisories/GHSA-r787-5hp3-4874",
      "source": "security-advisories@github.com"
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      "description": [
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          "value": "CWE-862"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 3.18.0, FileRise upload-enabled shared-folder and upload-only links do not reject a destination filename that already exists. An unauthenticated visitor with a valid share token and any configured share password can upload a file with the same name as an existing file and silently replace its content while the original uploader metadata remains. The same replacement gap affects ordinary authenticated uploads through /api/upload/upload.php and authenticated upload-only users who lack edit authority over the existing file. This issue is fixed in version 3.18.0."
    }
  ],
  "lastModified": "2026-10-15T16:18:18.850",
  "sourceIdentifier": "security-advisories@github.com"
}