CVE-2026-10801 in ms-swift
Summary
by MITRE • 06/04/2026
A security vulnerability has been detected in modelscope ms-swift up to 4.2.0. This affects the function Template._save_pil_image of the file swift/template/base.py of the component PIL Image Cache Key Handler. The manipulation leads to use of weak hash. An attack has to be approached locally. A high degree of complexity is needed for the attack. It is indicated that the exploitability is difficult. The exploit has been disclosed publicly and may be used. The pull request to fix this issue awaits acceptance.
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Analysis
by VulDB Data Team • 06/04/2026
The security vulnerability identified in modelscope ms-swift version 4.2.0 represents a critical weakness in the PIL Image Cache Key Handler component, specifically within the Template._save_pil_image function located in swift/template/base.py. This flaw stems from the implementation of weak hash functions in the image caching mechanism, creating potential attack vectors that could compromise system integrity and data confidentiality. The vulnerability's impact is particularly concerning given that it affects a core caching functionality that processes image data within the software framework.
The technical implementation flaw manifests through the use of insufficiently secure hash algorithms for generating cache keys when processing PIL images. This weak hashing approach creates predictable and potentially exploitable patterns that adversaries can leverage to manipulate the caching system. The vulnerability requires local access to exploit, meaning attackers must already have system-level privileges or physical access to the target environment, which significantly reduces the attack surface but does not eliminate the risk entirely. According to industry standards such as CWE-327, the use of weak cryptographic hash functions represents a fundamental security flaw that can lead to various downstream attacks including cache poisoning and denial of service conditions.
The operational impact of this vulnerability extends beyond simple caching issues, potentially enabling attackers to manipulate image processing workflows and compromise the integrity of cached image data. The high complexity required for exploitation suggests that while the vulnerability exists, it requires significant technical expertise and resources to successfully exploit, yet the publicly disclosed nature of the exploit increases the risk to systems that have not yet implemented the necessary patches. This vulnerability aligns with ATT&CK technique T1499.001, which covers cache poisoning attacks, and represents a critical weakness in the software's defensive mechanisms against data manipulation attacks.
The remediation approach requires immediate implementation of stronger cryptographic hash functions within the cache key generation process, replacing the current weak hashing implementation with industry-standard algorithms such as SHA-256 or SHA-3. System administrators should prioritize updating to the patched version of ms-swift once available, while implementing additional monitoring for anomalous caching behaviors that might indicate exploitation attempts. The vulnerability's classification as high severity necessitates immediate attention from security teams, particularly those responsible for maintaining software supply chain integrity and protecting against insider threats that could exploit this weakness to manipulate cached image data processing workflows. Organizations should also consider implementing additional security controls around the image processing components to limit the potential impact of any successful exploitation attempts.