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CVE Record

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

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.

MediumCVSS 6.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2025-46421 is a credential leakage flaw in libsoup. When an application follows an HTTP redirect, it may send an Authorization header to the redirected host. That host could receive credentials meant for the original site and use them to impersonate the user there.

Executive priority

Treat as a moderate-priority credential exposure issue. It is not shown as actively exploited, but affected authenticated clients could leak secrets to another host. Patch covered Red Hat systems through normal security update processes and prioritize internet-facing or high-trust workflows.

Technical view

The issue is classified as CWE-497 and has CVSS 3.1 score 6.8. Red Hat describes affected libsoup/libsoup3 packages across RHEL 8, 9, 10 and several extended support streams. Exploitation requires a redirect flow and user/client interaction, but successful exposure can affect confidentiality and integrity.

Likely exposure

Exposure is most likely on Red Hat systems with affected libsoup or libsoup3 packages used by authenticated HTTP clients that follow redirects. RHEL 6 and 7 status is listed as unknown in the bundle. Non-Red Hat distribution status is not established by the provided sources.

Exploitation context

The bundle does not show CISA KEV listing or cited evidence of active exploitation. The attack context is credential disclosure during cross-host redirects, with high attack complexity and required user/client interaction per CVSS.

Researcher notes

Evidence is strongest for Red Hat-packaged libsoup/libsoup3. The bundle does not provide exploit proof, fixed upstream version details, or complete non-Red Hat impact. Focus validation on redirect behavior, Authorization header handling, package lineage, and advisory applicability.

Mitigation direction

  • Apply relevant Red Hat RHSA updates for affected RHEL streams.
  • Inventory systems for libsoup and libsoup3 package exposure.
  • Prioritize clients handling Authorization headers and automatic redirects.
  • For non-Red Hat builds, check vendor or upstream libsoup guidance.
  • Review applications for unnecessary credentialed redirect behavior.

Validation and detection

  • Confirm installed package versions against the Red Hat advisory coverage.
  • Verify updated advisory packages are installed on affected systems.
  • Identify applications using libsoup for authenticated HTTP requests.
  • Review logs for unexpected cross-host redirects involving authenticated requests.
  • Track RHEL 6 and 7 status separately because the bundle marks them unknown.
Prepared
Confidence
high
Sources
12

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-497: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2025-46421 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
5Timeline events
1ADP providers
14Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: total

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.8CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N1.65.2redhat

Vulnerability scoring details

Base CVSS 3.1 score

6.8Medium
CVSS 3.1 vector shape for CVE-2025-46421Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineredhat

    Made public.

  2. Source timelineredhat

    Reported to Red Hat.

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Unknown vendorlibsouplibsoup, 0unaffected
Red HatRed Hat Enterprise Linux 10libsoup3, 0:3.6.5-3.el10_0affected
Red HatRed Hat Enterprise Linux 8libsoup, 0:2.62.3-8.el8_10affected
Red HatRed Hat Enterprise Linux 8libsoup, 0:2.62.3-8.el8_10affected
Red HatRed Hat Enterprise Linux 8.2 Advanced Update Supportlibsoup, 0:2.62.3-1.el8_2.4affected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportlibsoup, 0:2.62.3-2.el8_4.4affected
Red HatRed Hat Enterprise Linux 8.4 Telecommunications Update Servicelibsoup, 0:2.62.3-2.el8_4.4affected
Red HatRed Hat Enterprise Linux 8.4 Update Services for SAP Solutionslibsoup, 0:2.62.3-2.el8_4.4affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportlibsoup, 0:2.62.3-2.el8_6.4affected
Red HatRed Hat Enterprise Linux 8.6 Telecommunications Update Servicelibsoup, 0:2.62.3-2.el8_6.4affected
Red HatRed Hat Enterprise Linux 8.6 Update Services for SAP Solutionslibsoup, 0:2.62.3-2.el8_6.4affected
Red HatRed Hat Enterprise Linux 8.8 Extended Update Supportlibsoup, 0:2.62.3-3.el8_8.4affected
Red HatRed Hat Enterprise Linux 9libsoup, 0:2.72.0-10.el9_6.1affected
Red HatRed Hat Enterprise Linux 9.0 Update Services for SAP Solutionslibsoup, 0:2.72.0-8.el9_0.4affected
Red HatRed Hat Enterprise Linux 9.2 Extended Update Supportlibsoup, 0:2.72.0-8.el9_2.4affected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Supportlibsoup, 0:2.72.0-8.el9_4.4affected
Red HatRed Hat Enterprise Linux 6libsoupunknown
Red HatRed Hat Enterprise Linux 7libsoupunknown
Weakness

CWE details

CWE-497

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.