CVE-2026-66338
MEDIUM
5.4
CVSS Severity Score
Vulnerability Description
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.
Affected Platforms (CPE)
No CPE configurations currently published for this record.