Vulnerability-Lookup

CVE-2026-73405 (GCVE-0-2026-73405)

Vulnerability from cvelistv5 – Published: 2026-08-12 14:15 – Updated: 2026-08-12 17:10

Title

Authorization Bypass in SSE Pub/Sub Allows Unconfirmed Accounts to Access Stream Events in vulnerability-lookup

Summary

An authorization bypass vulnerability in Vulnerability-Lookup allowed inactive or unconfirmed accounts to subscribe to Server-Sent Events (SSE) streams through the /pubsub/subscribe/<topic> endpoint. The token_required decorator used by the Pub/Sub interface authenticated requests solely by matching the X-API-KEY header against an existing user API key. Unlike the REST API authentication mechanism, it did not verify the account's is_active and is_confirmed state. Because the self-registration process issues an API key before account confirmation is completed, an attacker could create an account and immediately use the resulting API key to access Pub/Sub topics that should only be available to active, confirmed users. This could expose stream events that would otherwise be inaccessible through the REST API, including newly submitted or not-yet-moderated data such as comments. The vulnerability results from inconsistent authorization enforcement between the REST API and the SSE streaming interface. The patch corrects the issue by requiring accounts to be both active and confirmed before permitting access to Pub/Sub streams, bringing the SSE authorization boundary in line with the REST API.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 17:10 UTC

CWE

CWE-862 - Missing Authorization

Assigner

CIRCL CNA under the ENISA root

CNA scorecard A 91/100 over 254 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/vulnerability-lookup/vulnerabi…	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
vulnerability-lookup	vulnerability-lookup	Affected: 0 , ≤ 5.5.1 (semver)	guessed

Credits

openai/gpt-5.5-cyber-preview (reasoning level: high) EUVD @ ENISA Team Cedric Bonhomme Alexandre Dulaunoy

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-73405

Vulnerability from fkie_nvd - Published: 2026-08-12 15:18 - Updated: 2026-08-26 16:49

Severity

5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	5a6e4751-2f3f-4070-9419-94fb35b644e8	https://github.com/vulnerability-lookup/vulnerability-lookup/commit/bef837242657acf680832be56b94428df130ed67

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      "value": "An authorization bypass vulnerability in Vulnerability-Lookup allowed inactive or unconfirmed accounts to subscribe to Server-Sent Events (SSE) streams through the /pubsub/subscribe/\u003ctopic\u003e endpoint.\n\n\nThe token_required decorator used by the Pub/Sub interface authenticated requests solely by matching the X-API-KEY header against an existing user API key. Unlike the REST API authentication mechanism, it did not verify the account\u0027s is_active and is_confirmed state.\n\n\nBecause the self-registration process issues an API key before account confirmation is completed, an attacker could create an account and immediately use the resulting API key to access Pub/Sub topics that should only be available to active, confirmed users. This could expose stream events that would otherwise be inaccessible through the REST API, including newly submitted or not-yet-moderated data such as comments.\n\n\nThe vulnerability results from inconsistent authorization enforcement between the REST API and the SSE streaming interface.\n\n\nThe patch corrects the issue by requiring accounts to be both active and confirmed before permitting access to Pub/Sub streams, bringing the SSE authorization boundary in line with the REST API."
    }
  ],
  "id": "CVE-2026-73405",
  "lastModified": "2026-08-26T16:49:18.760",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-73405",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-12T17:10:10.914574Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-12T15:18:33.343",
  "references": [
    {
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "url": "https://github.com/vulnerability-lookup/vulnerability-lookup/commit/bef837242657acf680832be56b94428df130ed67"
    }
  ],
  "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "type": "Secondary"
    }
  ]
}

GCVE-1-2026-20034 (CVE-2026-73405)

Vulnerability from gna-1 – Published: 2026-08-12 14:15 – Updated: 2026-08-12 14:15

Title

Authorization Bypass in SSE Pub/Sub Allows Unconfirmed Accounts to Access Stream Events in vulnerability-lookup

Summary

Severity

5.3 (Medium)


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

CWE

CWE-862 - Missing Authorization

Assigner

CIRCL GNA GNA-1

GNA scorecard A 90/100 over 257 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/vulnerability-lookup/vulnerabi…	patch

Impacted products

1 product

Vendor	Product	Version
vulnerability-lookup	vulnerability-lookup	Affected: 0 , ≤ 5.5.1 (semver)

Credits

openai/gpt-5.5-cyber-preview (reasoning level: high) EUVD @ ENISA Team Cedric Bonhomme Alexandre Dulaunoy

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "vulnerability-lookup",
          "repo": "https://github.com/vulnerability-lookup/vulnerability-lookup",
          "vendor": "vulnerability-lookup",
          "versions": [
            {
              "lessThanOrEqual": "5.5.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "tool",
          "value": "openai/gpt-5.5-cyber-preview (reasoning level: high)"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "EUVD @ ENISA Team"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Cedric Bonhomme"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Alexandre Dulaunoy"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAn authorization bypass vulnerability in \u003cstrong\u003eVulnerability-Lookup\u003c/strong\u003e allowed inactive or unconfirmed accounts to subscribe to Server-Sent Events (SSE) streams through the \u003ccode\u003e/pubsub/subscribe/\u0026lt;topic\u0026gt;\u003c/code\u003e endpoint.\u003c/p\u003e\n\u003cp\u003eThe \u003ccode\u003etoken_required\u003c/code\u003e decorator used by the Pub/Sub interface authenticated requests solely by matching the \u003ccode\u003eX-API-KEY\u003c/code\u003e header against an existing user API key. Unlike the REST API authentication mechanism, it did not verify the account\u0027s \u003ccode\u003eis_active\u003c/code\u003e and \u003ccode\u003eis_confirmed\u003c/code\u003e state.\u003c/p\u003e\n\u003cp\u003eBecause the self-registration process issues an API key before account confirmation is completed, an attacker could create an account and immediately use the resulting API key to access Pub/Sub topics that should only be available to active, confirmed users. This could expose stream events that would otherwise be inaccessible through the REST API, including newly submitted or not-yet-moderated data such as comments.\u003c/p\u003e\n\u003cp\u003eThe vulnerability results from inconsistent authorization enforcement between the REST API and the SSE streaming interface.\u003c/p\u003e\n\u003cp\u003eThe patch corrects the issue by requiring accounts to be both \u003cstrong\u003eactive\u003c/strong\u003e and \u003cstrong\u003econfirmed\u003c/strong\u003e before permitting access to Pub/Sub streams, bringing the SSE authorization boundary in line with the REST API.\u003c/p\u003e\u003cbr\u003e"
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        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-1",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"
            }
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      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
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            "valueDensity": "NOT_DEFINED",
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            "version": "4.0",
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            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "scenarios": [
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              "description": "CWE-862 Missing Authorization",
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        "orgId": "00000000-0000-4000-9000-000000000000"
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          "url": "https://github.com/vulnerability-lookup/vulnerability-lookup/commit/bef837242657acf680832be56b94428df130ed67"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Authorization Bypass in SSE Pub/Sub Allows Unconfirmed Accounts to Access Stream Events in vulnerability-lookup",
      "x_gcve": [
        {
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  "cveMetadata": {
    "assignerOrgId": "00000000-0000-4000-9000-000000000000",
    "cveId": "CVE-2026-73405",
    "datePublished": "2026-08-12T14:15:40.983661Z",
    "dateReserved": "2026-08-12T14:15:51.914Z",
    "dateUpdated": "2026-08-12T14:15:52.569796Z",
    "requesterUserId": "00000000-0000-4000-9000-000000000000",
    "serial": 1,
    "state": "PUBLISHED",
    "vulnId": "gcve-1-2026-20034"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

GHSA-8GV5-4Q99-4CXM

Vulnerability from github – Published: 2026-08-12 15:30 – Updated: 2026-08-12 15:30

Details

An authorization bypass vulnerability in Vulnerability-Lookup allowed inactive or unconfirmed accounts to subscribe to Server-Sent Events (SSE) streams through the /pubsub/subscribe/ endpoint.

The token_required decorator used by the Pub/Sub interface authenticated requests solely by matching the X-API-KEY header against an existing user API key. Unlike the REST API authentication mechanism, it did not verify the account's is_active and is_confirmed state.

Because the self-registration process issues an API key before account confirmation is completed, an attacker could create an account and immediately use the resulting API key to access Pub/Sub topics that should only be available to active, confirmed users. This could expose stream events that would otherwise be inaccessible through the REST API, including newly submitted or not-yet-moderated data such as comments.

The vulnerability results from inconsistent authorization enforcement between the REST API and the SSE streaming interface.

The patch corrects the issue by requiring accounts to be both active and confirmed before permitting access to Pub/Sub streams, bringing the SSE authorization boundary in line with the REST API.

Severity

5.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-73405"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-12T15:18:33Z",
    "severity": "MODERATE"
  },
  "details": "An authorization bypass vulnerability in Vulnerability-Lookup allowed inactive or unconfirmed accounts to subscribe to Server-Sent Events (SSE) streams through the /pubsub/subscribe/\u003ctopic\u003e endpoint.\n\n\nThe token_required decorator used by the Pub/Sub interface authenticated requests solely by matching the X-API-KEY header against an existing user API key. Unlike the REST API authentication mechanism, it did not verify the account\u0027s is_active and is_confirmed state.\n\n\nBecause the self-registration process issues an API key before account confirmation is completed, an attacker could create an account and immediately use the resulting API key to access Pub/Sub topics that should only be available to active, confirmed users. This could expose stream events that would otherwise be inaccessible through the REST API, including newly submitted or not-yet-moderated data such as comments.\n\n\nThe vulnerability results from inconsistent authorization enforcement between the REST API and the SSE streaming interface.\n\n\nThe patch corrects the issue by requiring accounts to be both active and confirmed before permitting access to Pub/Sub streams, bringing the SSE authorization boundary in line with the REST API.",
  "id": "GHSA-8gv5-4q99-4cxm",
  "modified": "2026-08-12T15:30:50Z",
  "published": "2026-08-12T15:30:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73405"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vulnerability-lookup/vulnerability-lookup/commit/bef837242657acf680832be56b94428df130ed67"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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-2026-73405 (GCVE-0-2026-73405)

FKIE_CVE-2026-73405

GCVE-1-2026-20034 (CVE-2026-73405)

GHSA-8GV5-4Q99-4CXM

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour