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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.

PUBLISHED Reserved 2026-01-28 | Published 2026-01-28 | Updated 2026-01-28 | Assigner redhat




MEDIUM: 5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Problem types

Insertion of Sensitive Information Into Sent Data

Product status

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-01-28:Reported to Red Hat.
2026-01-28:Made public.

Credits

Red Hat would like to thank Codean Labs for reporting this issue.

References

access.redhat.com/security/cve/CVE-2026-1539 vdb-entry

cve.org (CVE-2026-1539)

nvd.nist.gov (CVE-2026-1539)

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