CVE-2026-85703 in freegpt-webui
Summary
by MITRE • 09/04/2026
A flaw has been found in ramon-victor freegpt-webui up to 098db3dfeb41555c2ca9269df0f13e10ec1c35dc. Affected by this issue is the function getJailbreak of the file server/backend.py of the component Jailbreak Mode. Executing a manipulation can lead to allocation of resources. The attack can be executed remotely. The exploit has been published and may be used. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. This vulnerability only affects products that are no longer supported by the maintainer.
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Analysis
by VulDB Data Team • 09/04/2026
The identified security flaw resides within the freegpt-webui project maintained by ramon-victor, specifically affecting versions up to commit hash 098db3dfeb41555c2ca9269df0f13e10ec1c35dc. This vulnerability is located in the getJailbreak function within the server/backend.py file and impacts the Jailbreak Mode component of the application. The core technical issue involves an improper resource allocation mechanism that can be triggered by executing a specific manipulation against the affected service. While the description does not detail the exact code path, such flaws typically stem from insufficient validation or sanitization of input data before it is processed to allocate system resources like memory buffers or file handles. This lack of rigorous input checking allows an attacker to trigger excessive resource consumption, which aligns with common patterns found in CWE-400: Uncontrolled Resource Consumption vulnerabilities. The presence of this flaw indicates a failure in implementing proper limits on the amount of computational effort or storage that can be consumed by a single request or session.
The operational impact of this vulnerability is significant due to its remote executability, meaning an attacker does not need local access or authentication credentials to exploit it over a network connection. By sending crafted requests to the getJailbreak endpoint, an adversary can force the server to allocate disproportionate amounts of resources relative to normal operation. This behavior is characteristic of Denial of Service attacks, where the goal is to exhaust system capacity such as CPU cycles, memory, or disk space, thereby rendering the service unavailable to legitimate users. In the context of web applications that interface with external AI services via jailbreak modes, resource exhaustion can also lead to cascading failures if the backend relies on limited connection pools or rate-limited API calls from third-party providers. The exploit for this vulnerability has been published and is actively available in public repositories, which significantly increases the risk landscape as automated scanning tools and malicious actors can easily leverage known proof-of-concept code to target vulnerable instances without needing to develop custom exploitation techniques.
From a threat intelligence perspective, this type of resource exhaustion attack often maps to specific tactics within the MITRE ATT&CK framework. It is most closely associated with T1498: Network Denial of Service or potentially T1529: System Shutdown or Reboot if the resource exhaustion leads to system crashes requiring restarts. The vulnerability exploits a weakness in how the application manages state and resources during specific operational modes, highlighting gaps in defensive coding practices for web interfaces that expose complex backend logic directly to untrusted input sources. Since the product implements a rolling release model, version tracking is inherently difficult, making it challenging for administrators to determine precisely which builds are affected without analyzing commit histories or source code timestamps against the provided hash limit. This dynamic delivery method complicates patch management and vulnerability assessment processes, as static version numbers cannot be reliably used to filter out vulnerable systems in enterprise environments.
Mitigation strategies must focus on immediate isolation and architectural hardening given that the maintainer no longer supports these specific versions of the product. The most effective short-term remedy is to disable or remove access to the Jailbreak Mode functionality entirely if it is not strictly required for business operations, thereby eliminating the attack surface associated with the getJailbreak function. If the feature must remain active, implementing strict rate limiting and request throttling at the network perimeter using a Web Application Firewall can help mitigate resource exhaustion by capping the number of requests allowed from a single IP address within a given time window. Additionally, deploying input validation middleware that enforces size limits on all incoming payloads sent to backend endpoints can prevent excessively large or malformed data structures from triggering deep processing loops or massive memory allocations. Organizations should also consider migrating to alternative, actively maintained solutions for similar functionalities, as reliance on unsupported software with known public exploits poses an unacceptable risk profile in modern security postures. Regular audits of third-party dependencies and continuous monitoring for anomalous resource usage patterns are essential steps to detect potential exploitation attempts before they result in service disruption.