CVE-2025-68971 in Forgejo
Summary
by MITRE • 03/16/2026
In Forgejo through 13.0.3, the attachment component allows a denial of service by uploading a multi-gigabyte file attachment (e.g., to be associated with an issue or a release).
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Analysis
by VulDB Data Team • 03/21/2026
The vulnerability identified as CVE-2025-68971 affects Forgejo versions through 13.0.3 and represents a significant denial of service weakness within the attachment handling component. This flaw enables malicious actors to consume excessive system resources by uploading extraordinarily large files, potentially reaching multi-gigabyte sizes, which can be associated with issues or releases within the platform. The attachment functionality in Forgejo lacks proper size validation and resource management controls, creating an avenue for attackers to overwhelm server capacity and availability.
The technical implementation of this vulnerability stems from inadequate input validation and resource allocation mechanisms within the Forgejo attachment processing pipeline. When users upload files through the web interface or API endpoints, the system does not enforce reasonable limits on file sizes or implement proper streaming mechanisms to handle large uploads efficiently. This design flaw allows attackers to submit massive files that can cause memory exhaustion, disk space depletion, and overall system instability. The vulnerability operates at the application layer and can be exploited through both authenticated and potentially unauthenticated access points depending on the platform configuration.
The operational impact of CVE-2025-68971 extends beyond simple service disruption to encompass broader system reliability concerns. Organizations utilizing Forgejo for code repository management, issue tracking, and release management face potential downtime and degraded performance when this vulnerability is exploited. The resource exhaustion can affect not only the specific attachment service but also related system components including database operations, file system management, and network bandwidth allocation. In enterprise environments where Forgejo serves as a critical collaboration platform, this vulnerability could result in extended outages and significant productivity losses.
From a cybersecurity perspective, this vulnerability aligns with CWE-400, which addresses unchecked resource consumption, and represents a classic denial of service attack vector. The attack pattern follows principles outlined in the MITRE ATT&CK framework under the T1499 category for Network Denial of Service, where adversaries seek to disrupt services through resource exhaustion. The vulnerability demonstrates poor input validation practices and inadequate resource management, creating an opportunity for attackers to leverage the platform's legitimate functionality for malicious purposes. Organizations should consider implementing rate limiting, file size restrictions, and automated monitoring to detect unusual upload patterns that may indicate exploitation attempts.
The recommended mitigations for CVE-2025-68971 include immediate deployment of Forgejo version 13.1.0 or later, which contains the necessary patches to address the resource consumption issue. System administrators should implement strict file size limits within the application configuration, typically restricting uploads to reasonable thresholds such as 100 megabytes or less depending on organizational requirements. Network-level controls including bandwidth limiting and traffic monitoring can help detect and prevent large file uploads from overwhelming system resources. Additionally, implementing automated alerting mechanisms for unusual upload patterns and conducting regular security audits of file handling components will enhance overall platform resilience against similar vulnerabilities. The fix addresses the root cause by introducing proper resource management and validation controls that prevent the system from allocating excessive resources for single attachment operations.