# CVE-2026-22665

## Summary

- **CVE ID:** CVE-2026-22665
- **Severity:** HIGH
- **CVSS Score:** 8.6 (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)
- **CWE:** CWE-178
- **Published:** Apr 3, 2026
- **Last Modified:** Jul 14, 2026

## 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.

## Affected Products

- f — prompts.chat (0)

## References

- [CNA](https://github.com/f/prompts.chat/pull/1098)
- [CNA](https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d)
- [CNA](https://www.vulncheck.com/advisories/prompts-chat-identity-confusion-via-case-sensitive-username-handling)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.33%
- **EPSS Percentile:** 26.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._