CVE-2026-22665
prompts.chat Identity Confusion via Case-Sensitive Username Handling
Description
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.
INFO
Published Date :
April 3, 2026, 9:17 p.m.
Last Modified :
July 24, 2026, 10:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Ensure consistent case sensitivity for username comparisons.
- Update username validation logic across all paths.
- Apply patches to resolve identity confusion.
- Review user data for impersonation indicators.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-22665.
| URL | Resource |
|---|---|
| https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d | Patch |
| https://github.com/f/prompts.chat/pull/1098 | Exploit Issue Tracking Vendor Advisory |
| https://www.vulncheck.com/advisories/prompts-chat-identity-confusion-via-case-sensitive-username-handling | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-22665 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-22665
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-22665 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-22665 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: prompts.chat de f, Description: prompts.chat anterior al commit 1464475 contiene una vulnerabilidad de confusión de identidad debido a un manejo inconsistente de nombres de usuario, tanto sensible a mayúsculas y minúsculas como insensible a mayúsculas y minúsculas, en las rutas de escritura y lectura, permitiendo a los atacantes crear nombres de usuario con variantes de mayúsculas y minúsculas que eluden las comprobaciones de unicidad. Los atacantes pueden explotar la resolución no determinista de nombres de usuario para suplantar cuentas de víctimas, reemplazar el contenido del perfil en URL canónicas e inyectar metadatos y contenido controlados por el atacante en toda la plataforma. -
CVE Modified by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/f/prompts.chat', 'vendor': 'f', 'product': 'prompts.chat', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1464475df2698fb7ccd0cdbc382b0750466f891d', 'versionType': 'git'}], 'defaultStatus': 'unaffected'}] [{'repo': 'https://github.com/f/prompts.chat', 'vendor': 'f', 'product': 'prompts.chat', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1464475df2698fb7ccd0cdbc382b0750466f891d', 'versionType': 'git'}], 'packageURL': 'pkg:github/f/prompts.chat', 'defaultStatus': 'unaffected'}] -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/f/prompts.chat', 'vendor': 'f', 'product': 'prompts.chat', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1464475df2698fb7ccd0cdbc382b0750466f891d', 'versionType': 'git'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-22665', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-04-06T17:52:44.355269Z'} -
CVE Modified by [email protected]
May. 26, 2026
Action Type Old Value New Value Changed Description 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. 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. -
Initial Analysis by [email protected]
Apr. 13, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:fka:prompts.chat:*:*:*:*:*:*:*:* versions up to (excluding) 2026-03-24 Added Reference Type VulnCheck: https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d Types: Patch Added Reference Type VulnCheck: https://github.com/f/prompts.chat/pull/1098 Types: Exploit, Issue Tracking, Vendor Advisory Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/prompts-chat-identity-confusion-via-case-sensitive-username-handling Types: Third Party Advisory -
New CVE Received by [email protected]
Apr. 03, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 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 Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-178 Added Reference https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d Added Reference https://github.com/f/prompts.chat/pull/1098 Added Reference https://www.vulncheck.com/advisories/prompts-chat-identity-confusion-via-case-sensitive-username-handling