Description
A flaw was found in the libsoup HTTP library that can cause proxy authentication credentials to be sent to unintended destinations. When handling HTTP redirects, libsoup removes the Authorization header but does not remove the Proxy-Authorization header if the request is redirected to a different host. As a result, sensitive proxy credentials may be leaked to third-party servers. Applications using libsoup for HTTP communication may unintentionally expose proxy authentication data.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
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 25.10 | libsoup2.4 | No fix yet | — |
| Ubuntu 25.10 | libsoup3 | 3.6.5-4ubuntu0.2 | USN-8020-1 |
| Ubuntu 24.04 LTS | libsoup2.4 | 2.74.3-6ubuntu1.8 | USN-8780-1 |
| Ubuntu 24.04 LTS | libsoup3 | 3.4.4-5ubuntu0.7 | USN-8780-1, USN-8020-1 |
| Ubuntu 22.04 LTS | libsoup2.4 | 2.74.2-3ubuntu0.8 | USN-8780-1 |
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+esm2 | USN-8780-1 |
| Ubuntu Pro 22.04 LTS | libsoup3 | 3.0.7-0ubuntu1+esm7 | USN-8780-1, USN-8020-1 |
| Ubuntu Pro 20.04 LTS | libsoup2.4 | 2.70.0-1ubuntu0.5+esm3 | USN-8780-1 |
| Ubuntu Pro 18.04 LTS | libsoup2.4 | 2.62.1-1ubuntu0.4+esm8 | USN-8780-1 |
| Ubuntu Pro 16.04 LTS | libsoup2.4 | 2.52.2-1ubuntu0.3+esm7 | USN-8780-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libsoup | 3.4.4-150600.3.37.1 | SUSE-SU-2026:0788-1 |
| SLES 15 SP7 | libsoup2 | 2.74.3-150600.4.30.1 | SUSE-SU-2026:0811-1 |
| SLES 15 SP6 | libsoup | 3.4.4-150600.3.37.1 | SUSE-SU-2026:0788-1 |
| SLES 15 SP6 | libsoup2 | 2.74.3-150600.4.30.1 | SUSE-SU-2026:0811-1 |
| SLES 15 SP5 | libsoup | 3.0.4-150400.3.37.1 | SUSE-SU-2026:0833-1 |
| SLES 15 SP5 | libsoup2 | 2.74.2-150400.3.31.1 | SUSE-SU-2026:0834-1 |
| SLES 15 SP4 | libsoup | 3.0.4-150400.3.37.1 | SUSE-SU-2026:0833-1 |
| SLES 15 SP4 | libsoup2 | 2.74.2-150400.3.31.1 | SUSE-SU-2026:0834-1 |
| SLES 12 SP5 | libsoup | 2.62.2-5.37.1 | SUSE-SU-2026:4690-1, SUSE-SU-2026:0796-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | libsoup | 3.6.6-160000.1.1 | SUSE-SU-2026:20902-1 |
| SLES for SAP 15 SP6 | libsoup | 3.4.4-150600.3.37.1 | SUSE-SU-2026:0788-1 |
| SLES for SAP 15 SP6 | libsoup2 | 2.74.3-150600.4.30.1 | SUSE-SU-2026:0811-1 |
| SLES for SAP 15 SP5 | libsoup | 3.0.4-150400.3.37.1 | SUSE-SU-2026:0833-1 |
| SLES for SAP 15 SP5 | libsoup2 | 2.74.2-150400.3.31.1 | SUSE-SU-2026:0834-1 |
| SLES for SAP 15 SP4 | libsoup | 3.0.4-150400.3.37.1 | SUSE-SU-2026:0833-1 |
| SLES for SAP 15 SP4 | libsoup2 | 2.74.2-150400.3.31.1 | SUSE-SU-2026:0834-1 |
| SLES 16.0 | libsoup | 3.6.6-160000.1.1 | SUSE-SU-2026:20902-1 |
| SLE Micro 6.2 | libsoup | 3.6.6-160000.1.1 | SUSE-SU-2026:20752-1 |
| SLE Micro 6.1 | libsoup | 3.4.4-slfo.1.1_7.1 | SUSE-SU-2026:20649-1 |
| SLE Micro 6.0 | libsoup | 3.4.2-14.1 | SUSE-SU-2026:20727-1 |
| SLE Micro 5.5 | libsoup2 | 2.74.2-150400.3.31.1 | SUSE-SU-2026:0834-1 |
| SLE Micro 5.4 | libsoup2 | 2.74.2-150400.3.31.1 | SUSE-SU-2026:0834-1 |
| SLE Micro 5.3 | libsoup2 | 2.74.2-150400.3.31.1 | SUSE-SU-2026:0834-1 |
| SLE Micro 5.2 | libsoup | 2.68.4-150200.4.33.1 | SUSE-SU-2026:0792-1 |
| SLE HPC 15 SP5 | libsoup | 3.0.4-150400.3.37.1 | SUSE-SU-2026:0833-1 |
| SLE HPC 15 SP5 | libsoup2 | 2.74.2-150400.3.31.1 | SUSE-SU-2026:0834-1 |
| SLE HPC 15 SP4 | libsoup | 3.0.4-150400.3.37.1 | SUSE-SU-2026:0833-1 |
| SLE HPC 15 SP4 | libsoup2 | 2.74.2-150400.3.31.1 | SUSE-SU-2026:0834-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libsoup | 3.6.6-2.1 | openSUSE-SU-2026:10276-1 |
| openSUSE Tumbleweed | libsoup2 | 2.74.3-18.1 | openSUSE-SU-2026:10291-1 |
| openSUSE Leap 16.0 | libsoup | 3.6.6-160000.1.1 | openSUSE-SU-2026:20384-1 |
| openSUSE Leap 16.0 | libsoup2 | 2.74.3-160000.4.1 | openSUSE-SU-2026:20354-1 |
| openSUSE Leap 15.6 | libsoup | 3.4.4-150600.3.37.1 | SUSE-SU-2026:0788-1 |
| openSUSE Leap 15.6 | libsoup2 | 2.74.3-150600.4.30.1 | SUSE-SU-2026:0811-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libsoup3 +2 | 3.6.5-56.amzn2023 | ALAS2023-2026-1460 |
Advisories 18
- SUSE-SU-2026:4690-1 Security update for libsoup SUSE / openSUSE Security Updates · Oct 17, 2026
- USN-8780-1 libsoup2.4, libsoup3 vulnerabilities Ubuntu Security Notices (USN) · Sep 18, 2026
- USN-8020-1 libsoup3 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- SUSE-SU-2026:20902-1 Security update for libsoup SUSE / openSUSE Security Updates · Apr 2, 2026
- openSUSE-SU-2026:20384-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 26, 2026
- SUSE-SU-2026:20752-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 25, 2026
- SUSE-SU-2026:20727-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 24, 2026
- openSUSE-SU-2026:20354-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10276-1 libsoup-3_0-0-3.6.6-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10291-1 libsoup-2_4-1-2.74.3-18.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20649-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0834-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Mar 7, 2026
- SUSE-SU-2026:0833-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 6, 2026
- SUSE-SU-2026:0811-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Mar 5, 2026
- ALAS2023-2026-1460 Important: libsoup3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 5, 2026
- SUSE-SU-2026:0796-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 4, 2026
- SUSE-SU-2026:0788-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 4, 2026
- SUSE-SU-2026:0792-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 4, 2026