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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Red Hat / Red Hat Enterprise Linux 10	affected
Red Hat / Red Hat Enterprise Linux 6	affected
Red Hat / Red Hat Enterprise Linux 7	affected
Red Hat / Red Hat Enterprise Linux 8	affected
Red Hat / Red Hat Enterprise Linux 9	affected

CWE

CWE-125

References

https://access.redhat.com/security/cve/CVE-2026-66337
https://bugzilla.redhat.com/show_bug.cgi?id=2506949

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.