How severe is CVE-2026-22665?

CVE-2026-22665 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-22665 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22665?

CVE-2026-22665 affects Fka Prompts.chat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22665?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-22665 have an EU (EUVD) identifier?

Yes. CVE-2026-22665 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18829.

When was CVE-2026-22665 published?

CVE-2026-22665 was published on 2026-04-03 and last updated on 2026-06-17.

CVE-2026-22665

CVE-2026-22665 is a high-severity vulnerability in Fka Prompts.chat with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-178.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 8.6
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18829
Weakness: CWE-178
Affected product: Fka Prompts.chat
Published: 2026-04-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-22665?: 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.
How severe is CVE-2026-22665?: CVE-2026-22665 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-22665 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22665?: CVE-2026-22665 affects Fka Prompts.chat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22665?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-22665 have an EU (EUVD) identifier?: Yes. CVE-2026-22665 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18829.
When was CVE-2026-22665 published?: CVE-2026-22665 was published on 2026-04-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fka:prompts.chat:*:*:*:*:*:*:*:*

More vulnerabilities in Fka Prompts.chat

CVE-2026-22661 — High (CVSS 8.1): prompts.chat prior to commit 0f8d4c3 contains a path traversal vulnerability in skill file handling that allows…
CVE-2026-22664 — High (CVSS 7.7): prompts.chat prior to commit 30a8f04 contains a server-side request forgery vulnerability in the Fal.ai media status…
CVE-2026-22663 — High (CVSS 7.5): prompts.chat prior to commit 7b81836 contains multiple authorization bypass vulnerabilities due to missing isPrivate…
CVE-2026-22662 — Medium (CVSS 4.3): prompts.chat prior to commit 1464475 contains a blind server-side request forgery vulnerability in the Wiro media…

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