Vulnerability-Lookup

CVE-2026-22665 (GCVE-0-2026-22665)

Vulnerability from cvelistv5 – Published: 2026-04-03 20:28 – Updated: 2026-07-14 15:53

Title

prompts.chat Identity Confusion via Case-Sensitive Username Handling

Summary

prompts.chat prior to commit 1464475, contains an identity confusion vulnerability due to inconsistent case-sensitive and case-insensitive handling of usernames across write and read paths, allowing attackers to create case-variant usernames that bypass uniqueness checks. Attackers can exploit non-deterministic username resolution to impersonate victim accounts, replace profile content on canonical URLs, and inject attacker-controlled metadata and content across the platform.

Severity

8.6 (High)


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

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-178 - Improper Handling of Case Sensitivity

Assigner

VulnCheck

References

3 references

URL	Tags
https://github.com/f/prompts.chat/pull/1098	issue-tracking
https://github.com/f/prompts.chat/commit/1464475d…	patch
https://www.vulncheck.com/advisories/prompts-chat…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
f	prompts.chat	Affected: 0 , < 1464475df2698fb7ccd0cdbc382b0750466f891d (git)

Credits

Mehmet Ince @mdisec

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-22665

Vulnerability from fkie_nvd - Published: 2026-04-03 21:17 - Updated: 2026-07-14 16:16

Severity

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

Summary

References

URL	Tags
disclosure@vulncheck.com	https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d	Patch
disclosure@vulncheck.com	https://github.com/f/prompts.chat/pull/1098	Exploit, Issue Tracking, Vendor Advisory
disclosure@vulncheck.com	https://www.vulncheck.com/advisories/prompts-chat-identity-confusion-via-case-sensitive-username-handling	Third Party Advisory

Impacted products

	Vendor	Product	Version
	fka	prompts.chat	*

JSON

To clipboard

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  "lastModified": "2026-07-14T16:16:50.647",
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          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-22665",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-06T17:52:44.355269Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-03T21:17:09.693",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d"
    },
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Vendor Advisory"
      ],
      "url": "https://github.com/f/prompts.chat/pull/1098"
    },
    {
      "source": "disclosure@vulncheck.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.vulncheck.com/advisories/prompts-chat-identity-confusion-via-case-sensitive-username-handling"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-178"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-PCQ9-M482-5R7J

Vulnerability from github – Published: 2026-04-03 21:31 – Updated: 2026-04-03 21:31

Details

prompts.chat prior to commit 1464475 contains an identity confusion vulnerability due to inconsistent case-sensitive and case-insensitive handling of usernames across write and read paths, allowing attackers to create case-variant usernames that bypass uniqueness checks. Attackers can exploit non-deterministic username resolution to impersonate victim accounts, replace profile content on canonical URLs, and inject attacker-controlled metadata and content across the platform.

Severity

8.1 (High)


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

8.6 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/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-2026-22665"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-178"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-03T21:17:09Z",
    "severity": "HIGH"
  },
  "details": "prompts.chat prior to commit 1464475 contains an identity confusion vulnerability due to inconsistent case-sensitive and case-insensitive handling of usernames across write and read paths, allowing attackers to create case-variant usernames that bypass uniqueness checks. Attackers can exploit non-deterministic username resolution to impersonate victim accounts, replace profile content on canonical URLs, and inject attacker-controlled metadata and content across the platform.",
  "id": "GHSA-pcq9-m482-5r7j",
  "modified": "2026-04-03T21:31:42Z",
  "published": "2026-04-03T21:31:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22665"
    },
    {
      "type": "WEB",
      "url": "https://github.com/f/prompts.chat/pull/1098"
    },
    {
      "type": "WEB",
      "url": "https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/prompts-chat-identity-confusion-via-case-sensitive-username-handling"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/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.

Action not permitted

CVE-2026-22665 (GCVE-0-2026-22665)

FKIE_CVE-2026-22665

GHSA-PCQ9-M482-5R7J

Tags

Sightings

Nomenclature