Bug 2456190 (CVE-2026-39365)

Summary: CVE-2026-39365 vite: Vite: Information disclosure via path traversal in dev server's .map request handling
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: aschwart, asoldano, bbaranow, bmaxwell, boliveir, bstansbe, dlofthou, dschmidt, erezende, istudens, ivassile, iweiss, jlanda, jwong, kshier, mosmerov, mposolda, msvehla, nwallace, omaciel, pberan, pesilva, pjindal, pmackay, rmartinc, rstancel, simaishi, smaestri, smcdonal, ssilvert, stcannon, sthorger, teagle, thjenkin, ttakamiy, vdosoudi, vmuzikar, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in Vite. The development server's handling of `.map` requests contains a path traversal vulnerability. A remote attacker can exploit this by sending a specially crafted request with directory traversal sequences (`../`) to bypass security restrictions. This allows the attacker to retrieve `.map` files located outside the project's intended directory, leading to information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2456264, 2456265, 2456266    
Bug Blocks:    

Description OSIDB Bzimport 2026-04-07 20:03:14 UTC 
Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, the dev server’s handling of .map requests for optimized dependencies resolves file paths and calls readFile without restricting ../ segments in the URL. As a result, it is possible to bypass the server.fs.strict allow list and retrieve .map files located outside the project root, provided they can be parsed as valid source map JSON. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.