CVE-2026-15714

NameCVE-2026-15714
DescriptionAn out-of-bounds read vulnerability was found in libsoup's multipart processing subsystem. The flaw exists in the soup_multipart_input_stream_read_headers() function inside soup-multipart-input-stream.c, which does not adequately restrict or validate the size of incoming multipart boundary strings. When processing a crafted HTTP response containing a malformed or oversized boundary parameter, the internal stream reader reads past the allocated buffer bounds. A remote, unauthenticated attacker can exploit this behavior to cause a service denial (DoS) through application failure or potentially read fragments of unauthorized memory metadata.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1142843

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libsoup2.4 (PTS)bullseye2.72.0-2vulnerable
bullseye (security)2.72.0-2+deb11u3vulnerable
bookworm2.74.3-1+deb12u1vulnerable
trixie2.74.3-10.1vulnerable
libsoup3 (PTS)bookworm3.2.3-0+deb12u2vulnerable
trixie3.6.5-3vulnerable
forky, sid3.6.6-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libsoup2.4source(unstable)(unfixed)
libsoup3source(unstable)(unfixed)1142843

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2499942
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/542

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