Description
A flaw was found in libsoup. When establishing HTTPS tunnels through a configured HTTP proxy, sensitive session cookies are transmitted in cleartext within the initial HTTP CONNECT request. A network-positioned attacker or a malicious HTTP proxy can intercept these cookies, leading to potential session hijacking or user impersonation.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | libsoup3 +1 | No fix yet | — |
| Debian 12 | libsoup3 +1 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libsoup2.4 | No fix yet | — |
| Ubuntu 26.10 | libsoup3 | 3.6.6-1ubuntu3 | USN-8890-2 |
| Ubuntu 26.04 LTS | libsoup3 | 3.6.6-1ubuntu0.1 | USN-8890-1 |
| Ubuntu 25.10 | libsoup2.4 | 2.74.3-10.1ubuntu4.1 | USN-8523-1 |
| Ubuntu 25.10 | libsoup3 | No fix yet | — |
| Ubuntu 24.04 LTS | libsoup2.4 | 2.74.3-6ubuntu1.7 | USN-8890-1, USN-8523-1 |
| Ubuntu 24.04 LTS | libsoup3 | 3.4.4-5ubuntu0.9 | USN-8890-1 |
| Ubuntu 22.04 LTS | libsoup2.4 | 2.74.2-3ubuntu0.7 | USN-8890-1, USN-8523-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | libsoup2.4 | 2.74.3-10.1ubuntu5+esm1 | USN-8890-1, USN-8523-1 |
| Ubuntu Pro 22.04 LTS | libsoup3 | 3.0.7-0ubuntu1+esm9 | USN-8890-1 |
| Ubuntu Pro 20.04 LTS | libsoup2.4 | 2.70.0-1ubuntu0.5+esm2 | USN-8890-1, USN-8523-1 |
| Ubuntu Pro 18.04 LTS | libsoup2.4 | 2.62.1-1ubuntu0.4+esm7 | USN-8890-1, USN-8523-1 |
| Ubuntu Pro 16.04 LTS | libsoup2.4 | 2.52.2-1ubuntu0.3+esm6 | USN-8890-1, USN-8523-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | libsoup3 +2 | 3.6.5-3.el10_1.11 | RHSA-2026:19143, RHSA-2026:15968 |
| RHEL 9 | libsoup +1 | 2.72.0-12.el9_7.6 | RHSA-2026:19356, RHSA-2026:13978 |
| RHEL 8 | libsoup +1 | 2.62.3-14.el8_10 | RHSA-2026:14087 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | libsoup3 +2 | 3.6.5-3.el10_0.15 | RHSA-2026:17482 |
| RHEL 9.6 EUS | libsoup +1 | 2.72.0-10.el9_6.7 | RHSA-2026:22317 |
| RHEL 9.4 E4S | libsoup +1 | 2.72.0-8.el9_4.10 | RHSA-2026:22323 |
| RHEL 9.2 E4S | libsoup +1 | 2.72.0-8.el9_2.11 | RHSA-2026:22316 |
| RHEL 9.0 E4S | libsoup +1 | 2.72.0-8.el9_0.10 | RHSA-2026:21686 |
| RHEL 8.8 TUS | libsoup +1 | 2.62.3-3.el8_8.9 | RHSA-2026:22710 |
| RHEL 8.8 E4S | libsoup +1 | 2.62.3-3.el8_8.9 | RHSA-2026:22710 |
| RHEL 8.6 EUS Long Life | libsoup +1 | 2.62.3-2.el8_6.9 | RHSA-2026:24344 |
| RHEL 8.6 AUS | libsoup +1 | 2.62.3-2.el8_6.9 | RHSA-2026:24344 |
| RHEL 8.4 EUS Long Life | libsoup +1 | 2.62.3-2.el8_4.9 | RHSA-2026:22716 |
| RHEL 8.4 AUS | libsoup +1 | 2.62.3-2.el8_4.9 | RHSA-2026:22716 |
| RHEL 7 ELS | libsoup +1 | 2.62.2-12.el7_9 | RHSA-2026:24722 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | libsoup3 +1 | 3.6.5-3.el10_2.11 | ALSA-2026:19143 |
| AlmaLinux 10 | libsoup3-doc | 3.6.5-3.el10_1.11 | ALSA-2026:19143, ALSA-2026:15968 |
| AlmaLinux 9 | libsoup +1 | 2.72.0-12.el9_7.6 | ALSA-2026:19356, ALSA-2026:13978 |
| AlmaLinux 8 | libsoup +1 | 2.62.3-14.el8_10 | ALSA-2026:14087 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | libsoup3 | 3.6.5-3.el10_1.11 | RLSA-2026:15968 |
| Rocky Linux 9 | libsoup | 2.72.0-12.el9_7.6 | RLSA-2026:19356, RLSA-2026:13978 |
| Rocky Linux 8 | libsoup | 2.62.3-14.el8_10 | RLSA-2026:14087 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libsoup +2 | 2.72.0-6.amzn2023.0.12 | ALAS2023-2026-1758 |
| Amazon Linux 2023 | libsoup3 +2 | 3.6.6-58.amzn2023 | ALAS2023-2026-1778 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libsoup | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | libsoup3 +2 | 3.6.5-3.el10_1.11 | ELSA-2026-19143, ELSA-2026-15968 |
| Oracle Linux 9 | libsoup +1 | 2.72.0-12.el9_7.6 | ELSA-2026-19356, ELSA-2026-13978 |
| Oracle Linux 8 | libsoup +1 | 2.62.3-14.el8_10 | ELSA-2026-14087 |
| Oracle Linux 7 | libsoup +1 | 2.62.2-2.0.13.el7 | ELSA-2026-24722 |
Advisories 36
- ALSA-2026:19356 Moderate: libsoup security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:13978 Moderate: libsoup security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:19143 Moderate: libsoup3 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:15968 Moderate: libsoup3 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:14087 Moderate: libsoup security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-1007 IBM App Connect Enterprise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2026
- USN-8890-2 libsoup3 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- WID-SEC-2026-1409 Red Hat Enterprise Linux (libsoup): Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Oct 21, 2026
- USN-8890-1 libsoup2.4, libsoup3 vulnerabilities Ubuntu Security Notices (USN) · Oct 7, 2026
- RHSA-2026:24722 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:24344 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:22716 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:22710 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:22323 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:22316 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:22317 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:21686 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:19356 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:19143 Red Hat Security Advisory: libsoup3 security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:17482 Red Hat Security Advisory: libsoup3 security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:15968 Red Hat Security Advisory: libsoup3 security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:13978 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- RHSA-2026:14087 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Oct 3, 2026
- ELSA-2026-19143 Moderate: libsoup3 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- USN-8523-1 libsoup2.4 vulnerabilities Ubuntu Security Notices (USN) · Jul 10, 2026
- ELSA-2026-24722 Moderate: libsoup security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 29, 2026
- ELSA-2026-19356 Moderate: libsoup security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- ALAS2023-2026-1778 Moderate: libsoup3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- RLSA-2026:19356 Moderate: libsoup security update Rocky Linux Security Advisories · May 28, 2026
- ALAS2023-2026-1758 Moderate: libsoup security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 26, 2026
- RLSA-2026:15968 Moderate: libsoup3 security update Rocky Linux Security Advisories · May 13, 2026
- ELSA-2026-15968 Moderate: libsoup3 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · May 11, 2026
- RLSA-2026:13978 Moderate: libsoup security update Rocky Linux Security Advisories · May 7, 2026
- RLSA-2026:14087 Moderate: libsoup security update Rocky Linux Security Advisories · May 7, 2026
- ELSA-2026-13978 Moderate: libsoup security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 6, 2026
- ELSA-2026-14087 Moderate: libsoup security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 6, 2026
References
- RHSA-2026:13978 vendor-advisory
- RHSA-2026:14087 vendor-advisory
- RHSA-2026:15968 vendor-advisory
- RHSA-2026:17482 vendor-advisory
- RHSA-2026:19143 vendor-advisory
- RHSA-2026:19356 vendor-advisory
- RHSA-2026:21686 vendor-advisory
- RHSA-2026:22316 vendor-advisory
- RHSA-2026:22317 vendor-advisory
- RHSA-2026:22323 vendor-advisory
- RHSA-2026:22710 vendor-advisory
- RHSA-2026:22716 vendor-advisory
- RHSA-2026:24344 vendor-advisory
- RHSA-2026:24722 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-5119 vdb-entry
- RHBZ#2452932 issue-tracking
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/502