CVE-2026-22665

HIGH EPSS 25.0%
Published Apr 3, 20262mo ago · Modified Jun 17, 20261w ago
8.6 CVSS 4.0
High
Find Similar
Published Apr 3, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.6
Exploitability
—
Impact
—
Vector string
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
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
25.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-178

Affected Products 1

VendorProductVersionRange
fkaprompts.chat* <2026-03-24

References 3

  • github.com https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d
    Patch
  • github.com https://github.com/f/prompts.chat/pull/1098
    ExploitIssue TrackingVendor Advisory
  • vulncheck.com https://www.vulncheck.com/advisories/prompts-chat-identity-confusion-via-case-sensitive-username-handling
    Third Party Advisory

Remediation

  • github.com https://github.com/f/prompts.chat/commit/1464475df2698fb7ccd0cdbc382b0750466f891d
    Patch