CVE-2026-66337 – Libsoup: libsoup: heap buffer over-read via integer underflow in soup_filter_input_stream_read_until()

CVE ID :CVE-2026-66337

Published : July 24, 2026, 11:16 p.m. | 34 minutes ago

Description :A flaw was found in libsoup. An unsigned integer underflow in the soup_filter_input_stream_read_until() function causes a heap buffer over-read when parsing multipart HTTP responses. A malicious HTTP server can exploit this by sending a crafted multipart response, potentially causing the client application to crash or disclose sensitive heap memory.

Severity: 6.5 | MEDIUM

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