This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-66337 →
DEBIAN-CVE-2026-66337
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 p...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
libsoup2.4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
libsoup2.4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
libsoup3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
libsoup3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
libsoup3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- advisory security-tracker.debian.org