Vulnerability-Lookup

CVE-2026-73611 (GCVE-0-2026-73611)

Vulnerability from cvelistv5 – Published: 2026-08-13 11:28 – Updated: 2026-08-14 22:30

Title

File Browser 2.50.0 through 2.63.21 JWT Expiration Bypass

Summary

File Browser versions from 2.50.0 through 2.63.21 fail to validate JWT expiration when proxy authentication is configured with a non-default logout page. Attackers with a previously valid token can access protected routes and administrative endpoints indefinitely, and exchange expired tokens for fresh ones via the renewal endpoint.

Severity

7.6 (High)


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

6.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-14 22:29 UTC

CWE

CWE-613 - Insufficient Session Expiration

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://github.com/filebrowser/filebrowser/securi…	vendor-advisory
https://github.com/filebrowser/filebrowser/commit…	patch
https://www.vulncheck.com/advisories/file-browser…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
filebrowser	filebrowser	Unaffected: 0 , < 2.50.0 (semver) cpe:2.3:a:filebrowser:filebrowser::::::::

Date Public

2026-07-27 00:00

Credits

hacdias

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-73611

Vulnerability from fkie_nvd - Published: 2026-08-13 12:17 - Updated: 2026-09-08 20:32

Severity

6.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695
	disclosure@vulncheck.com	https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/file-browser-through-jwt-expiration-bypass
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "affected",
          "packageURL": "pkg:golang/github.com/filebrowser/filebrowser/v2",
          "product": "filebrowser",
          "vendor": "filebrowser",
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    }
  ],
  "id": "CVE-2026-73611",
  "lastModified": "2026-09-08T20:32:39.347",
  "metrics": {
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          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
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    "cvssMetricV40": [
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          "Recovery": "NOT_DEFINED",
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          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
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          "subConfidentialityImpact": "NONE",
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    },
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}

GHSA-32PR-94PQ-34PJ

Vulnerability from github – Published: 2026-08-13 12:31 – Updated: 2026-08-13 12:31

Details

Severity

6.8 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

7.6 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-73611"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-613"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-13T12:17:25Z",
    "severity": "HIGH"
  },
  "details": "File Browser versions from 2.50.0 through 2.63.21 fail to validate JWT expiration when proxy authentication is configured with a non-default logout page. Attackers with a previously valid token can access protected routes and administrative endpoints indefinitely, and exchange expired tokens for fresh ones via the renewal endpoint.",
  "id": "GHSA-32pr-94pq-34pj",
  "modified": "2026-08-13T12:31:10Z",
  "published": "2026-08-13T12:31:10Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v3jv-rmh2-635j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73611"
    },
    {
      "type": "WEB",
      "url": "https://github.com/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/file-browser-through-jwt-expiration-bypass"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/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",
      "type": "CVSS_V4"
    }
  ]
}

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.
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

CVE-2026-73611 (GCVE-0-2026-73611)

FKIE_CVE-2026-73611

GHSA-32PR-94PQ-34PJ

Tags

Sightings

Nomenclature

Related by attack behaviour