Bug 2506553 (CVE-2026-65920)

Summary: CVE-2026-65920 diffusers: Diffusers: Information disclosure via path traversal vulnerability
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: alinfoot, bbrownin, dtrifiro, rbryant, weaton
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Diffusers. This path traversal vulnerability in the `_get_checkpoint_shard_files` function allows a remote attacker to read arbitrary files. By supplying malicious `weight_map` values in model index JSON, an attacker can use `../` sequences or absolute paths to escape the model directory and read sensitive files outside the intended location during model loading. This could lead to information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-07-23 18:01:46 UTC 
Diffusers through 0.39.0, fixed in commit cee298c, contains a path traversal vulnerability in the _get_checkpoint_shard_files function that allows attackers to read arbitrary files by supplying malicious weight_map values in model index JSON. Attackers can use ../ sequences or absolute paths in weight_map entries to escape the model directory and read safetensors files outside the intended location during model loading.