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Advisory severityMedium6.8Red Hat Linux

Medium [CVE-2025-46421] information disclosure may leads libsoup client sends authorization header to a different host when being redirected by a server

This medium-severity Red Hat Linux advisory covers CVE-2025-46421 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2025-46421 Source published Source updated

VulniPulse record published

CVE-2025-46421
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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. Exploitation requires network access with high attack complexity, no privileges, and user interaction, and affects the confidentiality and integrity of the authenticated session but not availability.

Red Hat and the upstream CVE record both assess this flaw with a CVSS score of 6.8 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N), so the Red Hat severity matches upstream. A fix for the affected Red Hat products is being pursued.

Weakness: CWE-497.

Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Telecommunications Update Service; and 11 more.

Is CVE-2025-46421 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2025-46421 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2025-46421?

Upgrade to a fixed release named by Red Hat:

  • libsoup3-0:3.6.5-3.el10_0
  • libsoup-0:2.62.3-8.el8_10
  • libsoup-0:2.62.3-1.el8_2.4
  • libsoup-0:2.62.3-2.el8_4.4
  • libsoup-0:2.62.3-2.el8_6.4
  • libsoup-0:2.62.3-3.el8_8.4
  • libsoup-0:2.72.0-10.el9_6.1
  • libsoup-0:2.72.0-8.el9_0.4
  • libsoup-0:2.72.0-8.el9_2.4
  • libsoup-0:2.72.0-8.el9_4.4
  • RHSA-2025:7505
  • RHSA-2025:4560

8 more fixed releases are listed below.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 15 days ago·verify at source

Fixed versions
  • libsoup3-0:3.6.5-3.el10_0
  • libsoup-0:2.62.3-8.el8_10
  • libsoup-0:2.62.3-1.el8_2.4
  • libsoup-0:2.62.3-2.el8_4.4
  • libsoup-0:2.62.3-2.el8_6.4
  • libsoup-0:2.62.3-3.el8_8.4
  • libsoup-0:2.72.0-10.el9_6.1
  • libsoup-0:2.72.0-8.el9_0.4
  • libsoup-0:2.72.0-8.el9_2.4
  • libsoup-0:2.72.0-8.el9_4.4
  • RHSA-2025:7505
  • RHSA-2025:4560
  • RHSA-2025:4538
  • RHSA-2025:4609
  • RHSA-2025:4624
  • RHSA-2025:4568
  • RHSA-2025:7436
  • RHSA-2025:4439
  • RHSA-2025:4508
  • RHSA-2025:4440

Official advisory · high-confidence parse· fetched 15 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Currently, no mitigation is available for this vulnerability.

Official advisory · high-confidence parse· fetched 15 days ago·verify at source

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