Vulnerability-Lookup

CVE-2026-111933 (GCVE-0-2026-111933)

Vulnerability from cvelistv5 – Published: 2026-10-17 18:46 – Updated: 2026-10-19 15:12

Title

Coder before 2.34.2 User Enumeration via Login Placeholder Hash

Summary

Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 contains a user enumeration vulnerability because userpassword.Compare() substitutes a placeholder hash derived from the string "hunter2" when a stored password hash is empty. Unauthenticated attackers can submit logins with the password "hunter2" and distinguish HTTP 403 from 401 responses to enumerate valid accounts and reveal the authentication provider of SSO-only users.

Severity

6.3 (Medium)


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

3.7 (Low)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-19 15:09 UTC

CWE

CWE-203 - Observable Discrepancy

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 7720 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/coder/coder/security/advisorie…	vendor-advisory
https://www.vulncheck.com/advisories/coder-before…	third-party-advisory

Impacted products

4 products

Vendor	Product	Version	CPE status
coder	coder	Affected: 2.34.0 , < 2.34.2 (semver) Unaffected: 2.34.2 (semver)	guessed
coder	coder	Affected: 2.33.0 , < 2.33.8 (semver) Unaffected: 2.33.8 (semver)	guessed
coder	coder	Affected: 2.30.0 , < 2.32.7 (semver) Unaffected: 2.32.7 (semver)	guessed
coder	coder	Affected: 0 , < 2.29.17 (semver) Unaffected: 2.29.17 (semver)	guessed

Date Public

2026-06-12 00:00

Show details on NVD website

JSON

To clipboard

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          ],
          "metrics": [
            {
              "cvssV4_0": {
                "attackComplexity": "HIGH",
                "attackRequirements": "PRESENT",
                "attackVector": "NETWORK",
                "baseScore": 6.3,
                "baseSeverity": "MEDIUM",
                "privilegesRequired": "NONE",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "LOW",
                "vulnIntegrityImpact": "NONE"
              },
              "format": "CVSS"
            },
            {
              "cvssV3_1": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 3.7,
                "baseSeverity": "LOW",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
              },
              "format": "CVSS"
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-203",
                  "description": "Observable Discrepancy",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-17T18:46:43.456Z",
            "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
            "shortName": "VulnCheck"
          },
          "references": [
            {
              "name": "GitHub Security Advisory (GHSA-8fxq-53rx-ph5f)",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://github.com/coder/coder/security/advisories/GHSA-8fxq-53rx-ph5f"
            },
            {
              "name": "VulnCheck Advisory: Coder before 2.34.2 User Enumeration via Login Placeholder Hash",
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.vulncheck.com/advisories/coder-before-2.34.2-user-enumeration-via-login-placeholder-hash"
            }
          ],
          "title": "Coder before 2.34.2 User Enumeration via Login Placeholder Hash",
          "x_generator": {
            "engine": "vulncheck-endgame"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2026-111933",
        "datePublished": "2026-10-17T18:46:43.456Z",
        "dateReserved": "2026-10-17T12:20:52.372Z",
        "dateUpdated": "2026-10-19T15:12:57.230Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-111933

Vulnerability from fkie_nvd - Published: 2026-10-17 19:16 - Updated: 2026-10-24 19:10

Severity

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

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/coder/coder/security/advisories/GHSA-8fxq-53rx-ph5f
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/coder-before-2.34.2-user-enumeration-via-login-placeholder-hash

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:golang/github.com/coder/coder/v2",
          "product": "coder",
          "vendor": "coder",
          "versions": [
            {
              "lessThan": "2.34.2",
              "status": "affected",
              "version": "2.34.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "2.34.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:golang/github.com/coder/coder/v2",
          "product": "coder",
          "vendor": "coder",
          "versions": [
            {
              "lessThan": "2.33.8",
              "status": "affected",
              "version": "2.33.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "2.33.8",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:golang/github.com/coder/coder/v2",
          "product": "coder",
          "vendor": "coder",
          "versions": [
            {
              "lessThan": "2.32.7",
              "status": "affected",
              "version": "2.30.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "2.32.7",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:golang/github.com/coder/coder/v2",
          "product": "coder",
          "vendor": "coder",
          "versions": [
            {
              "lessThan": "2.29.17",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "2.29.17",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "disclosure@vulncheck.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 contains a user enumeration vulnerability because userpassword.Compare() substitutes a placeholder hash derived from the string \"hunter2\" when a stored password hash is empty. Unauthenticated attackers can submit logins with the password \"hunter2\" and distinguish HTTP 403 from 401 responses to enumerate valid accounts and reveal the authentication provider of SSO-only users."
    },
    {
      "lang": "es",
      "value": "Coder versiones anteriores a 2.29.17, versiones 2.30.0 hasta la versi\u00f3n 2.32.7 excluida, versiones 2.33.0 hasta la versi\u00f3n 2.33.8 excluida y versiones 2.34.0 hasta la versi\u00f3n 2.34.2 excluida contiene una vulnerabilidad de enumeraci\u00f3n de usuarios porque userpassword.Compare() sustituye un hash de marcador de posici\u00f3n derivado de la cadena \\\u201chunter2\\\u201d cuando el hash de la contrase\u00f1a almacenada est\u00e1 vac\u00edo. Los atacantes no autenticados pueden enviar inicios de sesi\u00f3n con la contrase\u00f1a \\\u201chunter2\\\u201d y distinguir respuestas HTTP 403 de 401 para enumerar cuentas v\u00e1lidas y revelar el proveedor de autenticaci\u00f3n de los usuarios exclusivamente SSO."
    }
  ],
  "id": "CVE-2026-111933",
  "lastModified": "2026-10-24T19:10:00.127",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.3,
          "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": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/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": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-111933",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-19T15:09:55.562810Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-10-17T19:16:36.360",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/coder/coder/security/advisories/GHSA-8fxq-53rx-ph5f"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/coder-before-2.34.2-user-enumeration-via-login-placeholder-hash"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-203"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-WWFW-5CRG-94F6

Vulnerability from github – Published: 2026-10-17 21:31 – Updated: 2026-10-17 21:31

Details

Severity

3.7 (Low)


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

6.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-111933"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-203"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-17T19:16:36Z",
    "severity": "MODERATE"
  },
  "details": "Coder before 2.29.17, 2.30.0 before 2.32.7, 2.33.0 before 2.33.8, and 2.34.0 before 2.34.2 contains a user enumeration vulnerability because userpassword.Compare() substitutes a placeholder hash derived from the string \"hunter2\" when a stored password hash is empty. Unauthenticated attackers can submit logins with the password \"hunter2\" and distinguish HTTP 403 from 401 responses to enumerate valid accounts and reveal the authentication provider of SSO-only users.",
  "id": "GHSA-wwfw-5crg-94f6",
  "modified": "2026-10-17T21:31:20Z",
  "published": "2026-10-17T21:31:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/coder/coder/security/advisories/GHSA-8fxq-53rx-ph5f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111933"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/coder-before-2.34.2-user-enumeration-via-login-placeholder-hash"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/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

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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-2026-111933 (GCVE-0-2026-111933)

FKIE_CVE-2026-111933

GHSA-WWFW-5CRG-94F6

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour