Skip to content
Fencer Intel
medium 6.8

CVE-2025-46421 json

Libsoup: information disclosure may leads libsoup client sends authorization header to a different host when being redirected by a server

published last yr. modified 4d ago also EUVD-2025-12111

cvss
6.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

A flaw was found in libsoup. When libsoup clients encounter an HTTP redirect, they mistakenly send the HTTP Authorization header to the new host that the redirection points to. This allows the new host to impersonate the user to the original host that issued the redirect.

Patch / fix

  • gitlab.gnome.org libsoup 3.6.5
  • Red Hat Red Hat Enterprise Linux 10 0:3.6.5-3.el10_0
  • Red Hat Red Hat Enterprise Linux 8 0:2.62.3-8.el8_10
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.62.3-1.el8_2.4
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.62.3-2.el8_4.4
  • Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service 0:2.62.3-2.el8_4.4
  • Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions 0:2.62.3-2.el8_4.4
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.62.3-2.el8_6.4
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.62.3-2.el8_6.4
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.62.3-2.el8_6.4
  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support 0:2.62.3-3.el8_8.4
  • Red Hat Red Hat Enterprise Linux 9 0:2.72.0-10.el9_6.1
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.72.0-8.el9_0.4
  • Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:2.72.0-8.el9_2.4
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:2.72.0-8.el9_4.4
  • libsoup3 Debian 12 3.2.3-0+deb12u1
  • libsoup3 Debian 13 3.6.5-1

debian advisories DEBIAN-CVE-2025-46421

  • libsoup3 Ubuntu 24.04 LTS 3.4.4-5ubuntu0.3
  • libsoup2.4 Ubuntu 20.04 LTS 2.70.0-1ubuntu0.3
  • libsoup2.4 Ubuntu 22.04 LTS 2.74.2-3ubuntu0.3
  • libsoup2.4 Ubuntu 24.04 LTS 2.74.3-6ubuntu1.3
  • libsoup2.4 Ubuntu 25.10 2.74.3-10.1ubuntu1
  • libsoup3 Ubuntu Pro 22.04 LTS 3.0.7-0ubuntu1+esm3
  • libsoup2.4 Ubuntu Pro 16.04 LTS 2.52.2-1ubuntu0.3+esm1
  • libsoup2.4 Ubuntu Pro 18.04 LTS 2.62.1-1ubuntu0.4+esm2

ubuntu advisories UBUNTU-CVE-2025-46421

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libsoup3 RHEL 10.0 3.6.5-3.el10_0
  • libsoup RHEL 9 2.72.0-10.el9_6.1
  • libsoup RHEL 8 2.62.3-8.el8_10
  • libsoup RHEL 8.6 TUS, RHEL 8.6 E4S, RHEL 8.6 AUS 2.62.3-2.el8_6.4
  • libsoup RHEL 8.4 TUS, RHEL 8.4 E4S, RHEL 8.4 AUS 2.62.3-2.el8_4.4
  • libsoup RHEL 8.8 EUS 2.62.3-3.el8_8.4
  • libsoup RHEL 8.2 AUS 2.62.3-1.el8_2.4
  • libsoup RHEL 9.2 EUS 2.72.0-8.el9_2.4

red hat advisories RHSA-2025:7505RHSA-2025:7436RHSA-2025:4624RHSA-2025:4609RHSA-2025:4568RHSA-2025:4560

  • libsoup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +8 more 2.74.3-150400.3.40.1
  • libsoup Linux Micro 6.1 3.4.4-slfo.1.1_3.1
  • libsoup SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 3.4.4-150600.3.7.1
  • libsoup2 SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 2.74.3-150600.4.6.1
  • libsoup Linux Micro 6.0 3.4.2-6.1
  • libsoup SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +2 more 2.68.4-150200.4.6.1
  • libsoup SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +7 more 3.0.4-150400.3.7.1
  • libsoup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +10 more 2.74.2-150400.3.6.1

suse advisories SUSE-SU-2026:3936-1SUSE-SU-2025:20446-1SUSE-SU-2025:01504-1SUSE-SU-2025:01503-1SUSE-SU-2025:20375-1SUSE-SU-2025:1519-1

  • libsoup2 openSUSE Tumbleweed 2.74.3-9.1

opensuse advisories openSUSE-SU-2025:15044-1

  • libsoup AlmaLinux 9 2.72.0-10.el9_6.1
  • libsoup3 AlmaLinux 10 3.6.5-3.el10_0
  • libsoup AlmaLinux 8 2.62.3-8.el8_10

almalinux advisories ALSA-2025:7436ALSA-2025:7505ALSA-2025:4560

  • libsoup Rocky Linux 8 2.62.3-8.el8_10

rocky linux advisories RLSA-2025:4560

  • libsoup CBL-Mariner 2.0 3.0.4-6
  • libsoup Azure Linux 3.0 3.4.4-6

azure linux advisories AZL-61498AZL-61630

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2025-46421 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-46421 updated cvss 6.8

libsoup: Information disclosure may leads libsoup client sends Authorization header to a different host when being redirected by a server

  • Red Hat Enterprise Linux 6 libsoup Red Hat Enterprise Linux 7 libsoup
    affected: workaround, no fix planned “Currently, no mitigation is available for this vulnerability.”
  • Red Hat Enterprise Linux AppStream (v. 8) libsoup-devel 2.62.3-8.el8_10, libsoup-debuginfo 2.62.3-8.el8_10, libsoup-debugsource 2.62.3-8.el8_10
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4560
  • Red Hat Enterprise Linux AppStream (v. 9) libsoup 2.72.0-10.el9_6.1
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:7436
  • Red Hat Enterprise Linux AppStream (v. 10) libsoup3 3.6.5-3.el10_0
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:7505
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) libsoup-devel 2.62.3-1.el8_2.4, libsoup-debuginfo 2.62.3-1.el8_2.4, libsoup-debugsource 2.62.3-1.el8_2.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4538
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) libsoup-devel 2.62.3-2.el8_4.4, libsoup-debuginfo 2.62.3-2.el8_4.4, libsoup-debugsource 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) libsoup-devel 2.62.3-2.el8_6.4, libsoup-debuginfo 2.62.3-2.el8_6.4, libsoup-debugsource 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux AppStream E4S (v.8.4) libsoup-devel 2.62.3-2.el8_4.4, libsoup-debuginfo 2.62.3-2.el8_4.4, libsoup-debugsource 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
show 17 more
  • Red Hat Enterprise Linux AppStream E4S (v.8.6) libsoup-devel 2.62.3-2.el8_6.4, libsoup-debuginfo 2.62.3-2.el8_6.4, libsoup-debugsource 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) libsoup 2.72.0-8.el9_0.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4439
  • Red Hat Enterprise Linux AppStream EUS (v.8.8) libsoup-devel 2.62.3-3.el8_8.4, libsoup-debuginfo 2.62.3-3.el8_8.4, libsoup-debugsource 2.62.3-3.el8_8.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4568
  • Red Hat Enterprise Linux AppStream EUS (v.9.2) libsoup 2.72.0-8.el9_2.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4508
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) libsoup 2.72.0-8.el9_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4440
  • Red Hat Enterprise Linux AppStream TUS (v.8.4) libsoup-devel 2.62.3-2.el8_4.4, libsoup-debuginfo 2.62.3-2.el8_4.4, libsoup-debugsource 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) libsoup-devel 2.62.3-2.el8_6.4, libsoup-debuginfo 2.62.3-2.el8_6.4, libsoup-debugsource 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux BaseOS (v. 8) libsoup 2.62.3-8.el8_10
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4560
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) libsoup 2.62.3-1.el8_2.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4538
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) libsoup 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) libsoup 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux BaseOS E4S (v.8.4) libsoup 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux BaseOS E4S (v.8.6) libsoup 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux BaseOS EUS (v.8.8) libsoup 2.62.3-3.el8_8.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4568
  • Red Hat Enterprise Linux BaseOS TUS (v.8.4) libsoup 2.62.3-2.el8_4.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4609
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) libsoup 2.62.3-2.el8_6.4
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:4624
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libsoup3-doc 3.6.5-3.el10_0
    fixed: vendor fix “Currently, no mitigation is available for this vulnerability.” RHSA-2025:7505

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

  • gitlab.gnome.org libsoup
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support
  • 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 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
  • CWE-497 Exposure of Sensitive System Information to an Unauthorized Control Sphere

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.