CVE-2026-1539

MEDIUM

5.8

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.

CVE Details

CVSS v3.1 Score5.8

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published1/28/2026

Last Modified3/19/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-201

References

https://access.redhat.com/security/cve/CVE-2026-1539(secalert@redhat.com)

https://gitlab.gnome.org/GNOME/libsoup/-/issues/489(secalert@redhat.com)

IOC Correlations

No correlations recorded

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