https://feed.craftedsignal.io/tags/prompts.chat/Trending threats, MITRE ATT&CK coverage, and detection metadata — refreshed continuously.Hugoenhello@craftedsignal.iohello@craftedsignal.ioSat, 04 Apr 2026 12:00:00 +0000https://feed.craftedsignal.io/briefs/2026-04-prompts-chat-traversal/Sat, 04 Apr 2026 12:00:00 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-04-prompts-chat-traversal/A path traversal vulnerability exists in prompts.chat prior to commit 0f8d4c3, allowing attackers to write arbitrary files to the client system by crafting malicious ZIP archives with unsanitized filenames.prompts.chat, a software application, is vulnerable to a path traversal attack (CVE-2026-22661) in versions prior to commit 0f8d4c3. This vulnerability stems from insufficient server-side validation of filenames within skill file archives. A remote attacker can exploit this by crafting malicious ZIP archives that contain filenames with path traversal sequences (e.g., ../). When a vulnerable prompts.chat instance extracts these archives, the lack of proper sanitization allows the attacker to write files to arbitrary locations on the file system, potentially overwriting critical system files and achieving arbitrary code execution. This poses a significant risk to system integrity and confidentiality.

Attack Chain

1. The attacker crafts a malicious ZIP archive containing a specially crafted skill file.
2. The filenames within the ZIP archive include path traversal sequences such as ../.
3. The attacker uploads the malicious ZIP archive to the prompts.chat application.
4. prompts.chat processes the uploaded ZIP archive without properly sanitizing the filenames.
5. The application extracts the contents of the ZIP archive, writing files to locations specified in the malicious filenames.
6. Path traversal sequences in the filenames allow the attacker to write files outside the intended extraction directory.
7. The attacker overwrites shell initialization files (e.g., .bashrc, .profile, .bash_profile) or other executable files.
8. When a user logs in or a new shell is spawned, the overwritten initialization file executes malicious code, granting the attacker arbitrary code execution on the system.

Impact

Successful exploitation of CVE-2026-22661 allows an attacker to write arbitrary files to the client system, leading to potential overwrite of sensitive system files and arbitrary code execution. The vulnerability affects systems running vulnerable versions of prompts.chat. The impact includes complete compromise of the system, data theft, and further propagation of malicious activities.

Recommendation

• Apply the patch by upgrading to commit 0f8d4c3 or later to remediate CVE-2026-22661.
• Implement server-side filename validation and sanitization to prevent path traversal attacks when handling ZIP archives within prompts.chat.
• Deploy the Sigma rules provided in this brief to your SIEM to detect potential exploitation attempts.
• Monitor web server logs for suspicious requests containing path traversal sequences in filenames as identified by the provided rules.

]]>highadvisorypath-traversalfile-writecode-executioncve-2026-22661prompts.chatlinuxhttps://feed.craftedsignal.io/briefs/2026-04-prompts-chat-ssrf/Fri, 03 Apr 2026 21:17:09 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-04-prompts-chat-ssrf/prompts.chat prior to commit 30a8f04 is vulnerable to server-side request forgery (SSRF) in Fal.ai media status polling, allowing authenticated users to perform arbitrary outbound requests by supplying attacker-controlled URLs, leading to potential credential theft and internal network probing.prompts.chat, a web application, contains a server-side request forgery (SSRF) vulnerability affecting versions prior to commit 30a8f04. This flaw resides in the Fal.ai media status polling feature. An authenticated user can inject arbitrary URLs into the token parameter, causing the server to make outbound requests to attacker-controlled destinations. The vulnerability, identified as CVE-2026-22664, allows attackers to potentially extract the FAL_API_KEY from the Authorization header during these requests. Successful exploitation can result in credential theft, internal network probing, and abuse of the victim’s Fal.ai account. This vulnerability poses a significant risk as it could lead to unauthorized access and data breaches.

Attack Chain

1. Attacker authenticates to the prompts.chat application.
2. Attacker crafts a malicious URL containing a server controlled by them.
3. The attacker initiates a media status polling request to Fal.ai, injecting the malicious URL into the token parameter.
4. The prompts.chat server, lacking proper URL validation, makes an outbound HTTP request to the attacker’s server.
5. The request includes the Authorization header, potentially exposing the FAL_API_KEY.
6. The attacker’s server captures the Authorization header containing the FAL_API_KEY.
7. The attacker uses the stolen FAL_API_KEY to access the victim’s Fal.ai account.
8. The attacker performs unauthorized actions, such as data exfiltration or resource abuse.

Impact

Successful exploitation of this SSRF vulnerability (CVE-2026-22664) allows attackers to steal the FAL_API_KEY, potentially impacting all users of the vulnerable prompts.chat application who utilize the Fal.ai integration. Consequences include unauthorized access to Fal.ai accounts, data breaches, internal network scans originating from the prompts.chat server, and financial losses due to resource abuse. The specific number of victims and the extent of the damage depend on the attacker’s objectives and the permissions associated with the compromised Fal.ai API key.

Recommendation

• Inspect web server logs for outbound requests to unusual or suspicious domains originating from the prompts.chat server to detect potential SSRF attempts (log source: webserver).
• Deploy the provided Sigma rule to detect HTTP requests containing a suspicious token parameter potentially indicative of SSRF exploitation.
• Monitor network traffic for unusual outbound connections from the prompts.chat server (log source: network_connection).
• Apply the patch or upgrade prompts.chat to a version after commit 30a8f04, which addresses the CVE-2026-22664 vulnerability.

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