Linux · SUSE Linux Enterprise · Security advisory · October 7, 2026

SUSE-SU-2026:4558-1: libsoup security update

SUSE-SU-2026:4558-1, released October 7, 2026, fixes 6 CVEs in libsoup (version 3.4.4-150600.3.56.1). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

7.5

Base score, 0 to 10

Highest EPSS

0.0075

55th percentile

Priority of the 6 CVEs

Patch now 0
                                Urgent 0
                                High 1
                                Routine 5

Fixed package versions

Product	Release	Fixed in
libsoup	sles 15.6	3.4.4-150600.3.56.1
libsoup	sles 15.7	3.4.4-150600.3.56.1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-15711	Libsoup: soupwebsocketconnection: libsoup: websocket remote denial of service via oversized control frame protocol violation	7.5	0.0075	None reported
Routine	CVE-2026-15712	Soupclientmessageiohttp2: libsoup3: libsoup: http/2 goaway frame parsing heap buffer over-read via invalid nul-termination assumption	5.9	0.0063	None reported
Routine	CVE-2026-15714	Libsoup: soupmultipartinputstream: libsoup: out-of-bounds read in soup_multipart_input_stream_read_headers via an oversized multipart boundary string	6.5	0.0039	None reported
Routine	CVE-2026-66339	gir1.2-soup-2.4: A flaw was found in libsoup	n/a	0.0025	None reported
Routine	CVE-2026-12478	libsoup3: The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) bl...	4.8	0.0024	None reported
Routine	CVE-2026-12547	Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on proxy switch	3.4	0.0023	None reported

Also fixes CVE-2026-15711

FEDORA-2026-FCE2F41203
libsoup3, libsoup3-debuginfo, libsoup3-debugsource and 6 more on Fedora 43
ELSA-2026-68235
libsoup3, libsoup3-devel, libsoup3-doc on ol 10
ALSA-2026:68235
libsoup3, libsoup3-devel, libsoup3-doc on almalinux 10
RHSA-2026:68234
libsoup, libsoup-devel on RHEL 9
RLSA-2026:68234
libsoup on rocky 9
ALSA-2026:68234
libsoup, libsoup-devel on almalinux 9
ELSA-2026-68234
libsoup, libsoup-devel on ol 9
RHSA-2026:71389
libsoup3 on RHEL 10

Vendor advisory

https://osv.dev/vulnerability/SUSE-SU-2026:4558-1

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