CVE-2026-66338
MEDIUM
5,4
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Description
AI Translation Available
A flaw was found in libsoup. The chunked transfer encoding parser uses a permissive parsing function for chunk sizes that silently accepts inputs violating RFC 9112, including leading whitespace, plus sign prefixes, and trailing invalid characters. When libsoup operates behind a strict frontend proxy, this parsing differential can be exploited to smuggle HTTP requests.
444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
IncompleteCommon Consequences
Security Scopes Affected:
Integrity
Non-Repudiation
Access Control
Potential Impacts:
Unexpected State
Hide Activities
Bypass Protection Mechanism
Applicable Platforms
Technologies:
Web Based, Web Server
https://access.redhat.com/security/cve/CVE-2026-66338
https://bugzilla.redhat.com/show_bug.cgi?id=2506950