Bug 2558281 (CVE-2026-114418)

Summary:	CVE-2026-114418 phodav: Authentication bypass in PUT request handling via libsoup3 status override
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	security-response-team
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in phodav. The service fails to properly enforce authentication failures during HTTP PUT requests, continuing to process file uploads even after the request has been rejected. A remote, unauthenticated attacker can exploit this flaw to create or overwrite files within the shared directory, bypassing configured authentication controls.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Bug Depends On:	2569224
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Description OSIDB Bzimport 2026-10-21 12:57:36 UTC

An authentication bypass vulnerability was found in libphodav's PUT request handling. The streaming PUT handler in got_headers() processes requests even after libsoup3 has already rejected the message due to authentication failure for a path covered by a SoupAuthDomain. phodav ignores the rejection status and processes the PUT anyway, overwriting the response status. As a result, an unauthenticated client can create or overwrite files within the shared directory even when authentication is configured via htdigest. This issue was introduced by the libsoup3 port (commit c5879e6a, 2022-06-29) and affects phodav 3.0.

Comment 2 Mauro Matteo Cascella 2026-11-09 18:12:38 UTC

Fixed in v3.2: https://gitlab.gnome.org/GNOME/phodav/-/releases/v3.2

Upstream MR and fix:
- https://gitlab.gnome.org/GNOME/phodav/-/merge_requests/35
- https://gitlab.gnome.org/GNOME/phodav/-/commit/9759627a007f52734d89c4ae47d28e1511c3583a