CVE-2026-22661Public exploitNetwork attack vector

Client code execution via unsanitized ZIP filenames

Published Apr 3, 2026 · Updated Apr 3, 2026

Path traversal in prompts.chat before commit 0f8d4c3 allows remote authenticated users to plant arbitrary paths in skill ZIP archives. Server endpoints store unvalidated skill filenames, and the download route passes those names to zip.file(), allowing traversal entries to escape the extraction directory. Exploitation requires a victim to download and extract the archive with a permissive tool; overwriting a shell initialization file executes code when a new shell starts.

CVSS severity8.6
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in prompts.chat before commit 0f8d4c3 allows remote authenticated users to plant arbitrary paths in skill ZIP archives. Server endpoints store unvalidated skill filenames, and the download route passes those names to zip.file(), allowing traversal entries to escape the extraction directory. Exploitation requires a victim to download and extract the archive with a permissive tool; overwriting a shell initialization file executes code when a new shell starts.

The record

CVE
CVE-2026-22661
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
Fatih Kadir Akın
Product
prompts.chat
Classifications
CWE-22, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <0f8d4c381abd7b2d7478c9fdee9522149c2d65e5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Fatih Kadir Akın · prompts.chatversion=0 <0f8d4c381abd7b2d7478c9fdee9522149c2d65e5

Published CVSS scores

8.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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