Proxy credential disclosure via cross-host redirects
Published Jan 28, 2026 · Updated Jan 28, 2026
Credential exposure in libsoup on Red Hat Enterprise Linux 6 through 10 allows remote attackers to receive proxy credentials via HTTP redirects. Redirect handling strips the origin Authorization header but retains Proxy-Authorization when a request changes hosts, forwarding the proxy secret to the redirect destination. Exposure requires an application to use an authenticated proxy and follow a cross-host redirect; the reported consequence is limited to disclosure of proxy credentials.
Summary
What happened
Credential exposure in libsoup on Red Hat Enterprise Linux 6 through 10 allows remote attackers to receive proxy credentials via HTTP redirects. Redirect handling strips the origin Authorization header but retains Proxy-Authorization when a request changes hosts, forwarding the proxy secret to the redirect destination. Exposure requires an application to use an authenticated proxy and follow a cross-host redirect; the reported consequence is limited to disclosure of proxy credentials.
The record
- CVE
- CVE-2026-1539
- Published
- Jan 28, 2026
- Updated
- Jan 28, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 6
- Classifications
- CWE-201
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 28, 2026CVE publishedPublication date reported by the CVE source.
- Jan 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo